Finding the Fourth Proportional to 22,612.03, 31,206.52 and 12,543.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,612.03 : 31,206.52 = 12,543.72 : x
2. Step 2: Convert to fraction form
   22,612.03/31,206.52 = 12,543.72/x
3. Step 3: Cross multiply
   22,612.03x = 31,206.52 × 12,543.72
4. Step 4: Simplify right side
   22,612.03x = 391,445,802.40
5. Step 5: Solve for x
   x = 391,445,802.40/22,612.03
6. Step 6: Final answer
   x = 17,311.39