Finding the Fourth Proportional to 99,885.69, 137,959.27 and 79,535.88

Step by Step Solution

1. Step 1: Write the proportion equation
   99,885.69 : 137,959.27 = 79,535.88 : x
2. Step 2: Convert to fraction form
   99,885.69/137,959.27 = 79,535.88/x
3. Step 3: Cross multiply
   99,885.69x = 137,959.27 × 79,535.88
4. Step 4: Simplify right side
   99,885.69x = 10,972,711,744.77
5. Step 5: Solve for x
   x = 10,972,711,744.77/99,885.69
6. Step 6: Final answer
   x = 109,852.69