Finding the Fourth Proportional to 12,670.92, 17,478.86 and 7,365.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,670.92 : 17,478.86 = 7,365.15 : x
2. Step 2: Convert to fraction form
   12,670.92/17,478.86 = 7,365.15/x
3. Step 3: Cross multiply
   12,670.92x = 17,478.86 × 7,365.15
4. Step 4: Simplify right side
   12,670.92x = 128,734,388.90
5. Step 5: Solve for x
   x = 128,734,388.90/12,670.92
6. Step 6: Final answer
   x = 10,159.83