Finding the Fourth Proportional to 152,774.64, 210,854.34 and 89,112.45

Step by Step Solution

1. Step 1: Write the proportion equation
   152,774.64 : 210,854.34 = 89,112.45 : x
2. Step 2: Convert to fraction form
   152,774.64/210,854.34 = 89,112.45/x
3. Step 3: Cross multiply
   152,774.64x = 210,854.34 × 89,112.45
4. Step 4: Simplify right side
   152,774.64x = 18,789,746,830.53
5. Step 5: Solve for x
   x = 18,789,746,830.53/152,774.64
6. Step 6: Final answer
   x = 122,989.96