Finding the Fourth Proportional to 9,059.18, 12,502.35 and 5,521.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,059.18 : 12,502.35 = 5,521.50 : x
2. Step 2: Convert to fraction form
   9,059.18/12,502.35 = 5,521.50/x
3. Step 3: Cross multiply
   9,059.18x = 12,502.35 × 5,521.50
4. Step 4: Simplify right side
   9,059.18x = 69,031,725.53
5. Step 5: Solve for x
   x = 69,031,725.53/9,059.18
6. Step 6: Final answer
   x = 7,620.09