Finding the Fourth Proportional to 13,025.31, 17,976.56 and 7,722.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,025.31 : 17,976.56 = 7,722.15 : x
2. Step 2: Convert to fraction form
   13,025.31/17,976.56 = 7,722.15/x
3. Step 3: Cross multiply
   13,025.31x = 17,976.56 × 7,722.15
4. Step 4: Simplify right side
   13,025.31x = 138,817,654.19
5. Step 5: Solve for x
   x = 138,817,654.19/13,025.31
6. Step 6: Final answer
   x = 10,657.53