Finding the Fourth Proportional to 99,734.04, 137,645.76 and 57,300.78

Step by Step Solution

1. Step 1: Write the proportion equation
   99,734.04 : 137,645.76 = 57,300.78 : x
2. Step 2: Convert to fraction form
   99,734.04/137,645.76 = 57,300.78/x
3. Step 3: Cross multiply
   99,734.04x = 137,645.76 × 57,300.78
4. Step 4: Simplify right side
   99,734.04x = 7,887,209,411.69
5. Step 5: Solve for x
   x = 7,887,209,411.69/99,734.04
6. Step 6: Final answer
   x = 79,082.42