Finding the Fourth Proportional to 12,620.34, 17,415.90 and 7,031.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,620.34 : 17,415.90 = 7,031.34 : x
2. Step 2: Convert to fraction form
   12,620.34/17,415.90 = 7,031.34/x
3. Step 3: Cross multiply
   12,620.34x = 17,415.90 × 7,031.34
4. Step 4: Simplify right side
   12,620.34x = 122,457,114.31
5. Step 5: Solve for x
   x = 122,457,114.31/12,620.34
6. Step 6: Final answer
   x = 9,703.15