Finding the Fourth Proportional to 57,661.30, 85,918.76 and 51,373

Step by Step Solution

1. Step 1: Write the proportion equation
   57,661.30 : 85,918.76 = 51,373 : x
2. Step 2: Convert to fraction form
   57,661.30/85,918.76 = 51,373/x
3. Step 3: Cross multiply
   57,661.30x = 85,918.76 × 51,373
4. Step 4: Simplify right side
   57,661.30x = 4,413,904,457.48
5. Step 5: Solve for x
   x = 4,413,904,457.48/57,661.30
6. Step 6: Final answer
   x = 76,548.82