Finding the Fourth Proportional to 12,910.61, 17,817.43 and 7,245.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,910.61 : 17,817.43 = 7,245.83 : x
2. Step 2: Convert to fraction form
   12,910.61/17,817.43 = 7,245.83/x
3. Step 3: Cross multiply
   12,910.61x = 17,817.43 × 7,245.83
4. Step 4: Simplify right side
   12,910.61x = 129,102,095.25
5. Step 5: Solve for x
   x = 129,102,095.25/12,910.61
6. Step 6: Final answer
   x = 9,999.69