Finding the Fourth Proportional to 9,885.52, 14,742.50 and 8,434

Step by Step Solution

1. Step 1: Write the proportion equation
   9,885.52 : 14,742.50 = 8,434 : x
2. Step 2: Convert to fraction form
   9,885.52/14,742.50 = 8,434/x
3. Step 3: Cross multiply
   9,885.52x = 14,742.50 × 8,434
4. Step 4: Simplify right side
   9,885.52x = 124,338,245
5. Step 5: Solve for x
   x = 124,338,245/9,885.52
6. Step 6: Final answer
   x = 12,577.82