Finding the Fourth Proportional to 22,771.17, 31,422.74 and 12,699.02

Step by Step Solution

1. Step 1: Write the proportion equation
   22,771.17 : 31,422.74 = 12,699.02 : x
2. Step 2: Convert to fraction form
   22,771.17/31,422.74 = 12,699.02/x
3. Step 3: Cross multiply
   22,771.17x = 31,422.74 × 12,699.02
4. Step 4: Simplify right side
   22,771.17x = 399,038,018.78
5. Step 5: Solve for x
   x = 399,038,018.78/22,771.17
6. Step 6: Final answer
   x = 17,523.83