Finding the Fourth Proportional to 152,109.54, 209,826.90 and 88,440.30

Step by Step Solution

1. Step 1: Write the proportion equation
   152,109.54 : 209,826.90 = 88,440.30 : x
2. Step 2: Convert to fraction form
   152,109.54/209,826.90 = 88,440.30/x
3. Step 3: Cross multiply
   152,109.54x = 209,826.90 × 88,440.30
4. Step 4: Simplify right side
   152,109.54x = 18,557,153,984.07
5. Step 5: Solve for x
   x = 18,557,153,984.07/152,109.54
6. Step 6: Final answer
   x = 121,998.62