Finding the Fourth Proportional to 12,407.91, 17,123.79 and 7,030.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,407.91 : 17,123.79 = 7,030.31 : x
2. Step 2: Convert to fraction form
   12,407.91/17,123.79 = 7,030.31/x
3. Step 3: Cross multiply
   12,407.91x = 17,123.79 × 7,030.31
4. Step 4: Simplify right side
   12,407.91x = 120,385,431.30
5. Step 5: Solve for x
   x = 120,385,431.30/12,407.91
6. Step 6: Final answer
   x = 9,702.31