Finding the Fourth Proportional to 12,422.52, 18,643.50 and 7,497.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,422.52 : 18,643.50 = 7,497.72 : x
2. Step 2: Convert to fraction form
   12,422.52/18,643.50 = 7,497.72/x
3. Step 3: Cross multiply
   12,422.52x = 18,643.50 × 7,497.72
4. Step 4: Simplify right side
   12,422.52x = 139,783,742.82
5. Step 5: Solve for x
   x = 139,783,742.82/12,422.52
6. Step 6: Final answer
   x = 11,252.45