Finding the Fourth Proportional to 99,943.63, 137,908.89 and 64,182.08

Step by Step Solution

1. Step 1: Write the proportion equation
   99,943.63 : 137,908.89 = 64,182.08 : x
2. Step 2: Convert to fraction form
   99,943.63/137,908.89 = 64,182.08/x
3. Step 3: Cross multiply
   99,943.63x = 137,908.89 × 64,182.08
4. Step 4: Simplify right side
   99,943.63x = 8,851,279,410.69
5. Step 5: Solve for x
   x = 8,851,279,410.69/99,943.63
6. Step 6: Final answer
   x = 88,562.72