Finding the Fourth Proportional to 99,682.61, 137,561.59 and 54,360.47

Step by Step Solution

1. Step 1: Write the proportion equation
   99,682.61 : 137,561.59 = 54,360.47 : x
2. Step 2: Convert to fraction form
   99,682.61/137,561.59 = 54,360.47/x
3. Step 3: Cross multiply
   99,682.61x = 137,561.59 × 54,360.47
4. Step 4: Simplify right side
   99,682.61x = 7,477,913,098.20
5. Step 5: Solve for x
   x = 7,477,913,098.20/99,682.61
6. Step 6: Final answer
   x = 75,017.23