Finding the Fourth Proportional to 152,144.64, 209,888.88 and 98,447

Step by Step Solution

1. Step 1: Write the proportion equation
   152,144.64 : 209,888.88 = 98,447 : x
2. Step 2: Convert to fraction form
   152,144.64/209,888.88 = 98,447/x
3. Step 3: Cross multiply
   152,144.64x = 209,888.88 × 98,447
4. Step 4: Simplify right side
   152,144.64x = 20,662,930,569.36
5. Step 5: Solve for x
   x = 20,662,930,569.36/152,144.64
6. Step 6: Final answer
   x = 135,811.10