Finding the Fourth Proportional to 10,139.06, 13,992.15 and 6,362.39

Step by Step Solution

1. Step 1: Write the proportion equation
   10,139.06 : 13,992.15 = 6,362.39 : x
2. Step 2: Convert to fraction form
   10,139.06/13,992.15 = 6,362.39/x
3. Step 3: Cross multiply
   10,139.06x = 13,992.15 × 6,362.39
4. Step 4: Simplify right side
   10,139.06x = 89,023,445.28
5. Step 5: Solve for x
   x = 89,023,445.28/10,139.06
6. Step 6: Final answer
   x = 8,780.25