Finding the Fourth Proportional to 99,893.61, 137,857.28 and 57,452.18

Step by Step Solution

1. Step 1: Write the proportion equation
   99,893.61 : 137,857.28 = 57,452.18 : x
2. Step 2: Convert to fraction form
   99,893.61/137,857.28 = 57,452.18/x
3. Step 3: Cross multiply
   99,893.61x = 137,857.28 × 57,452.18
4. Step 4: Simplify right side
   99,893.61x = 7,920,200,288.32
5. Step 5: Solve for x
   x = 7,920,200,288.32/99,893.61
6. Step 6: Final answer
   x = 79,286.36