Finding the Fourth Proportional to 115,003.10, 158,568.35 and 78,721.98

Step by Step Solution

1. Step 1: Write the proportion equation
   115,003.10 : 158,568.35 = 78,721.98 : x
2. Step 2: Convert to fraction form
   115,003.10/158,568.35 = 78,721.98/x
3. Step 3: Cross multiply
   115,003.10x = 158,568.35 × 78,721.98
4. Step 4: Simplify right side
   115,003.10x = 12,482,814,083.72
5. Step 5: Solve for x
   x = 12,482,814,083.72/115,003.10
6. Step 6: Final answer
   x = 108,543.29