Finding the Fourth Proportional to 13,456.47, 18,567.70 and 7,487.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,456.47 : 18,567.70 = 7,487.98 : x
2. Step 2: Convert to fraction form
   13,456.47/18,567.70 = 7,487.98/x
3. Step 3: Cross multiply
   13,456.47x = 18,567.70 × 7,487.98
4. Step 4: Simplify right side
   13,456.47x = 139,034,566.25
5. Step 5: Solve for x
   x = 139,034,566.25/13,456.47
6. Step 6: Final answer
   x = 10,332.17