Finding the Fourth Proportional to 103,300.97, 142,549.35 and 57,974.72

Step by Step Solution

1. Step 1: Write the proportion equation
   103,300.97 : 142,549.35 = 57,974.72 : x
2. Step 2: Convert to fraction form
   103,300.97/142,549.35 = 57,974.72/x
3. Step 3: Cross multiply
   103,300.97x = 142,549.35 × 57,974.72
4. Step 4: Simplify right side
   103,300.97x = 8,264,258,652.43
5. Step 5: Solve for x
   x = 8,264,258,652.43/103,300.97
6. Step 6: Final answer
   x = 80,001.75