Finding the Fourth Proportional to 56,779.50, 78,355.71 and 31,630.62

Step by Step Solution

1. Step 1: Write the proportion equation
   56,779.50 : 78,355.71 = 31,630.62 : x
2. Step 2: Convert to fraction form
   56,779.50/78,355.71 = 31,630.62/x
3. Step 3: Cross multiply
   56,779.50x = 78,355.71 × 31,630.62
4. Step 4: Simplify right side
   56,779.50x = 2,478,439,687.84
5. Step 5: Solve for x
   x = 2,478,439,687.84/56,779.50
6. Step 6: Final answer
   x = 43,650.26