Finding the Fourth Proportional to 103,298.97, 142,546.59 and 57,972.72

Step by Step Solution

1. Step 1: Write the proportion equation
   103,298.97 : 142,546.59 = 57,972.72 : x
2. Step 2: Convert to fraction form
   103,298.97/142,546.59 = 57,972.72/x
3. Step 3: Cross multiply
   103,298.97x = 142,546.59 × 57,972.72
4. Step 4: Simplify right side
   103,298.97x = 8,263,813,549.02
5. Step 5: Solve for x
   x = 8,263,813,549.02/103,298.97
6. Step 6: Final answer
   x = 79,998.99