Finding the Fourth Proportional to 12,830.32, 17,701.68 and 7,164.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,830.32 : 17,701.68 = 7,164.15 : x
2. Step 2: Convert to fraction form
   12,830.32/17,701.68 = 7,164.15/x
3. Step 3: Cross multiply
   12,830.32x = 17,701.68 × 7,164.15
4. Step 4: Simplify right side
   12,830.32x = 126,817,490.77
5. Step 5: Solve for x
   x = 126,817,490.77/12,830.32
6. Step 6: Final answer
   x = 9,884.20