Finding the Fourth Proportional to 8,998.50, 12,419.61 and 5,272.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,998.50 : 12,419.61 = 5,272.50 : x
2. Step 2: Convert to fraction form
   8,998.50/12,419.61 = 5,272.50/x
3. Step 3: Cross multiply
   8,998.50x = 12,419.61 × 5,272.50
4. Step 4: Simplify right side
   8,998.50x = 65,482,393.73
5. Step 5: Solve for x
   x = 65,482,393.73/8,998.50
6. Step 6: Final answer
   x = 7,277.03