Finding the Fourth Proportional to 99,874.49, 137,830.88 and 57,433.02

Step by Step Solution

1. Step 1: Write the proportion equation
   99,874.49 : 137,830.88 = 57,433.02 : x
2. Step 2: Convert to fraction form
   99,874.49/137,830.88 = 57,433.02/x
3. Step 3: Cross multiply
   99,874.49x = 137,830.88 × 57,433.02
4. Step 4: Simplify right side
   99,874.49x = 7,916,043,314.37
5. Step 5: Solve for x
   x = 7,916,043,314.37/99,874.49
6. Step 6: Final answer
   x = 79,259.92