Finding the Fourth Proportional to 12,703.59, 17,531.43 and 7,038.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,703.59 : 17,531.43 = 7,038.21 : x
2. Step 2: Convert to fraction form
   12,703.59/17,531.43 = 7,038.21/x
3. Step 3: Cross multiply
   12,703.59x = 17,531.43 × 7,038.21
4. Step 4: Simplify right side
   12,703.59x = 123,389,885.94
5. Step 5: Solve for x
   x = 123,389,885.94/12,703.59
6. Step 6: Final answer
   x = 9,712.99