Finding the Fourth Proportional to 42,120,003.70, 58,134,585.33 and 28,907,254.90

Step by Step Solution

1. Step 1: Write the proportion equation
   42,120,003.70 : 58,134,585.33 = 28,907,254.90 : x
2. Step 2: Convert to fraction form
   42,120,003.70/58,134,585.33 = 28,907,254.90/x
3. Step 3: Cross multiply
   42,120,003.70x = 58,134,585.33 × 28,907,254.90
4. Step 4: Simplify right side
   42,120,003.70x = 1,680,511,276,640,110.50
5. Step 5: Solve for x
   x = 1,680,511,276,640,110.50/42,120,003.70
6. Step 6: Final answer
   x = 39,898,174.95