Finding the Fourth Proportional to 99,498.30, 137,202.42 and 76,840.98

Step by Step Solution

1. Step 1: Write the proportion equation
   99,498.30 : 137,202.42 = 76,840.98 : x
2. Step 2: Convert to fraction form
   99,498.30/137,202.42 = 76,840.98/x
3. Step 3: Cross multiply
   99,498.30x = 137,202.42 × 76,840.98
4. Step 4: Simplify right side
   99,498.30x = 10,542,768,411.17
5. Step 5: Solve for x
   x = 10,542,768,411.17/99,498.30
6. Step 6: Final answer
   x = 105,959.28