Finding the Fourth Proportional to 83,399.78, 115,111.98 and 51,549.50

Step by Step Solution

1. Step 1: Write the proportion equation
   83,399.78 : 115,111.98 = 51,549.50 : x
2. Step 2: Convert to fraction form
   83,399.78/115,111.98 = 51,549.50/x
3. Step 3: Cross multiply
   83,399.78x = 115,111.98 × 51,549.50
4. Step 4: Simplify right side
   83,399.78x = 5,933,965,013.01
5. Step 5: Solve for x
   x = 5,933,965,013.01/83,399.78
6. Step 6: Final answer
   x = 71,150.85