Finding the Fourth Proportional to 10,612.77, 14,647.43 and 6,139.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,612.77 : 14,647.43 = 6,139.25 : x
2. Step 2: Convert to fraction form
   10,612.77/14,647.43 = 6,139.25/x
3. Step 3: Cross multiply
   10,612.77x = 14,647.43 × 6,139.25
4. Step 4: Simplify right side
   10,612.77x = 89,924,130.69
5. Step 5: Solve for x
   x = 89,924,130.69/10,612.77
6. Step 6: Final answer
   x = 8,473.20