Finding the Fourth Proportional to 152,778.32, 210,859.42 and 89,116.12

Step by Step Solution

1. Step 1: Write the proportion equation
   152,778.32 : 210,859.42 = 89,116.12 : x
2. Step 2: Convert to fraction form
   152,778.32/210,859.42 = 89,116.12/x
3. Step 3: Cross multiply
   152,778.32x = 210,859.42 × 89,116.12
4. Step 4: Simplify right side
   152,778.32x = 18,790,973,375.85
5. Step 5: Solve for x
   x = 18,790,973,375.85/152,778.32
6. Step 6: Final answer
   x = 122,995.03