Finding the Fourth Proportional to 13,710.48, 18,920.45 and 7,422.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,710.48 : 18,920.45 = 7,422.86 : x
2. Step 2: Convert to fraction form
   13,710.48/18,920.45 = 7,422.86/x
3. Step 3: Cross multiply
   13,710.48x = 18,920.45 × 7,422.86
4. Step 4: Simplify right side
   13,710.48x = 140,443,719.77
5. Step 5: Solve for x
   x = 140,443,719.77/13,710.48
6. Step 6: Final answer
   x = 10,243.53