Finding the Fourth Proportional to 99,714.38, 137,528.01 and 63,907.79

Step by Step Solution

1. Step 1: Write the proportion equation
   99,714.38 : 137,528.01 = 63,907.79 : x
2. Step 2: Convert to fraction form
   99,714.38/137,528.01 = 63,907.79/x
3. Step 3: Cross multiply
   99,714.38x = 137,528.01 × 63,907.79
4. Step 4: Simplify right side
   99,714.38x = 8,789,110,494.56
5. Step 5: Solve for x
   x = 8,789,110,494.56/99,714.38
6. Step 6: Final answer
   x = 88,142.86