Finding the Fourth Proportional to 83,459.78, 115,111.72 and 57,966.18

Step by Step Solution

1. Step 1: Write the proportion equation
   83,459.78 : 115,111.72 = 57,966.18 : x
2. Step 2: Convert to fraction form
   83,459.78/115,111.72 = 57,966.18/x
3. Step 3: Cross multiply
   83,459.78x = 115,111.72 × 57,966.18
4. Step 4: Simplify right side
   83,459.78x = 6,672,586,681.63
5. Step 5: Solve for x
   x = 6,672,586,681.63/83,459.78
6. Step 6: Final answer
   x = 79,949.73