Finding the Fourth Proportional to 8,698.72, 12,012.76 and 7,432.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,698.72 : 12,012.76 = 7,432.40 : x
2. Step 2: Convert to fraction form
   8,698.72/12,012.76 = 7,432.40/x
3. Step 3: Cross multiply
   8,698.72x = 12,012.76 × 7,432.40
4. Step 4: Simplify right side
   8,698.72x = 89,283,637.42
5. Step 5: Solve for x
   x = 89,283,637.42/8,698.72
6. Step 6: Final answer
   x = 10,264.00