Finding the Fourth Proportional to 56,607.12, 78,114.78 and 31,455

Step by Step Solution

1. Step 1: Write the proportion equation
   56,607.12 : 78,114.78 = 31,455 : x
2. Step 2: Convert to fraction form
   56,607.12/78,114.78 = 31,455/x
3. Step 3: Cross multiply
   56,607.12x = 78,114.78 × 31,455
4. Step 4: Simplify right side
   56,607.12x = 2,457,100,404.90
5. Step 5: Solve for x
   x = 2,457,100,404.90/56,607.12
6. Step 6: Final answer
   x = 43,406.21