Finding the Fourth Proportional to 1,087,708,820.37, 1,630,895,060.77 and 422,947,968.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087,708,820.37 : 1,630,895,060.77 = 422,947,968.72 : x
2. Step 2: Convert to fraction form
   1,087,708,820.37/1,630,895,060.77 = 422,947,968.72/x
3. Step 3: Cross multiply
   1,087,708,820.37x = 1,630,895,060.77 × 422,947,968.72
4. Step 4: Simplify right side
   1,087,708,820.37x = 689,783,753,148,152,448
5. Step 5: Solve for x
   x = 689,783,753,148,152,448/1,087,708,820.37
6. Step 6: Final answer
   x = 634,162,139.93