Finding the Fourth Proportional to 99,662.20, 137,456.06 and 63,855.56

Step by Step Solution

1. Step 1: Write the proportion equation
   99,662.20 : 137,456.06 = 63,855.56 : x
2. Step 2: Convert to fraction form
   99,662.20/137,456.06 = 63,855.56/x
3. Step 3: Cross multiply
   99,662.20x = 137,456.06 × 63,855.56
4. Step 4: Simplify right side
   99,662.20x = 8,777,333,686.69
5. Step 5: Solve for x
   x = 8,777,333,686.69/99,662.20
6. Step 6: Final answer
   x = 88,070.84