Finding the Fourth Proportional to 112,162.62, 168,251.10 and 78,326.31

Step by Step Solution

1. Step 1: Write the proportion equation
   112,162.62 : 168,251.10 = 78,326.31 : x
2. Step 2: Convert to fraction form
   112,162.62/168,251.10 = 78,326.31/x
3. Step 3: Cross multiply
   112,162.62x = 168,251.10 × 78,326.31
4. Step 4: Simplify right side
   112,162.62x = 13,178,487,816.44
5. Step 5: Solve for x
   x = 13,178,487,816.44/112,162.62
6. Step 6: Final answer
   x = 117,494.47