Finding the Fourth Proportional to 56,499.72, 77,970.36 and 31,006.28

Step by Step Solution

1. Step 1: Write the proportion equation
   56,499.72 : 77,970.36 = 31,006.28 : x
2. Step 2: Convert to fraction form
   56,499.72/77,970.36 = 31,006.28/x
3. Step 3: Cross multiply
   56,499.72x = 77,970.36 × 31,006.28
4. Step 4: Simplify right side
   56,499.72x = 2,417,570,813.86
5. Step 5: Solve for x
   x = 2,417,570,813.86/56,499.72
6. Step 6: Final answer
   x = 42,789.08