Finding the Fourth Proportional to 22,699.50, 31,325.32 and 12,763.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,699.50 : 31,325.32 = 12,763.50 : x
2. Step 2: Convert to fraction form
   22,699.50/31,325.32 = 12,763.50/x
3. Step 3: Cross multiply
   22,699.50x = 31,325.32 × 12,763.50
4. Step 4: Simplify right side
   22,699.50x = 399,820,721.82
5. Step 5: Solve for x
   x = 399,820,721.82/22,699.50
6. Step 6: Final answer
   x = 17,613.64