Finding the Fourth Proportional to 13,030.48, 17,981.62 and 7,722.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,030.48 : 17,981.62 = 7,722.15 : x
2. Step 2: Convert to fraction form
   13,030.48/17,981.62 = 7,722.15/x
3. Step 3: Cross multiply
   13,030.48x = 17,981.62 × 7,722.15
4. Step 4: Simplify right side
   13,030.48x = 138,856,766.88
5. Step 5: Solve for x
   x = 138,856,766.88/13,030.48
6. Step 6: Final answer
   x = 10,656.30