Finding the Fourth Proportional to 99,943.51, 137,908.72 and 64,181.96

Step by Step Solution

1. Step 1: Write the proportion equation
   99,943.51 : 137,908.72 = 64,181.96 : x
2. Step 2: Convert to fraction form
   99,943.51/137,908.72 = 64,181.96/x
3. Step 3: Cross multiply
   99,943.51x = 137,908.72 × 64,181.96
4. Step 4: Simplify right side
   99,943.51x = 8,851,251,629.78
5. Step 5: Solve for x
   x = 8,851,251,629.78/99,943.51
6. Step 6: Final answer
   x = 88,562.55