Finding the Fourth Proportional to 152,780.40, 210,862.32 and 89,118.24

Step by Step Solution

1. Step 1: Write the proportion equation
   152,780.40 : 210,862.32 = 89,118.24 : x
2. Step 2: Convert to fraction form
   152,780.40/210,862.32 = 89,118.24/x
3. Step 3: Cross multiply
   152,780.40x = 210,862.32 × 89,118.24
4. Step 4: Simplify right side
   152,780.40x = 18,791,678,840.72
5. Step 5: Solve for x
   x = 18,791,678,840.72/152,780.40
6. Step 6: Final answer
   x = 122,997.97