Finding the Fourth Proportional to 12,773.12, 17,621.90 and 9,423.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,773.12 : 17,621.90 = 9,423.98 : x
2. Step 2: Convert to fraction form
   12,773.12/17,621.90 = 9,423.98/x
3. Step 3: Cross multiply
   12,773.12x = 17,621.90 × 9,423.98
4. Step 4: Simplify right side
   12,773.12x = 166,068,345.05
5. Step 5: Solve for x
   x = 166,068,345.05/12,773.12
6. Step 6: Final answer
   x = 13,001.39