Finding the Fourth Proportional to 152,799.61, 210,876.84 and 89,157.91

Step by Step Solution

1. Step 1: Write the proportion equation
   152,799.61 : 210,876.84 = 89,157.91 : x
2. Step 2: Convert to fraction form
   152,799.61/210,876.84 = 89,157.91/x
3. Step 3: Cross multiply
   152,799.61x = 210,876.84 × 89,157.91
4. Step 4: Simplify right side
   152,799.61x = 18,801,338,321.80
5. Step 5: Solve for x
   x = 18,801,338,321.80/152,799.61
6. Step 6: Final answer
   x = 123,045.72