Finding the Fourth Proportional to 56,607.50, 78,118.36 and 31,457

Step by Step Solution

1. Step 1: Write the proportion equation
   56,607.50 : 78,118.36 = 31,457 : x
2. Step 2: Convert to fraction form
   56,607.50/78,118.36 = 31,457/x
3. Step 3: Cross multiply
   56,607.50x = 78,118.36 × 31,457
4. Step 4: Simplify right side
   56,607.50x = 2,457,369,250.52
5. Step 5: Solve for x
   x = 2,457,369,250.52/56,607.50
6. Step 6: Final answer
   x = 43,410.67