Finding the Fourth Proportional to 12,810.98, 17,672.42 and 10,423.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,810.98 : 17,672.42 = 10,423.61 : x
2. Step 2: Convert to fraction form
   12,810.98/17,672.42 = 10,423.61/x
3. Step 3: Cross multiply
   12,810.98x = 17,672.42 × 10,423.61
4. Step 4: Simplify right side
   12,810.98x = 184,210,517.21
5. Step 5: Solve for x
   x = 184,210,517.21/12,810.98
6. Step 6: Final answer
   x = 14,379.12