Finding the Fourth Proportional to 112,411.49, 154,836.82 and 78,359.09

Step by Step Solution

1. Step 1: Write the proportion equation
   112,411.49 : 154,836.82 = 78,359.09 : x
2. Step 2: Convert to fraction form
   112,411.49/154,836.82 = 78,359.09/x
3. Step 3: Cross multiply
   112,411.49x = 154,836.82 × 78,359.09
4. Step 4: Simplify right side
   112,411.49x = 12,132,872,504.89
5. Step 5: Solve for x
   x = 12,132,872,504.89/112,411.49
6. Step 6: Final answer
   x = 107,932.67