Finding the Fourth Proportional to 22,770.56, 31,423.51 and 12,699.43

Step by Step Solution

1. Step 1: Write the proportion equation
   22,770.56 : 31,423.51 = 12,699.43 : x
2. Step 2: Convert to fraction form
   22,770.56/31,423.51 = 12,699.43/x
3. Step 3: Cross multiply
   22,770.56x = 31,423.51 × 12,699.43
4. Step 4: Simplify right side
   22,770.56x = 399,060,602.91
5. Step 5: Solve for x
   x = 399,060,602.91/22,770.56
6. Step 6: Final answer
   x = 17,525.29