Finding the Fourth Proportional to 99,833.88, 137,892.06 and 78,890.52

Step by Step Solution

1. Step 1: Write the proportion equation
   99,833.88 : 137,892.06 = 78,890.52 : x
2. Step 2: Convert to fraction form
   99,833.88/137,892.06 = 78,890.52/x
3. Step 3: Cross multiply
   99,833.88x = 137,892.06 × 78,890.52
4. Step 4: Simplify right side
   99,833.88x = 10,878,376,317.27
5. Step 5: Solve for x
   x = 10,878,376,317.27/99,833.88
6. Step 6: Final answer
   x = 108,964.78