Finding the Fourth Proportional to 22,980.23, 31,711.50 and 12,909.10

Step by Step Solution

1. Step 1: Write the proportion equation
   22,980.23 : 31,711.50 = 12,909.10 : x
2. Step 2: Convert to fraction form
   22,980.23/31,711.50 = 12,909.10/x
3. Step 3: Cross multiply
   22,980.23x = 31,711.50 × 12,909.10
4. Step 4: Simplify right side
   22,980.23x = 409,366,701.55
5. Step 5: Solve for x
   x = 409,366,701.55/22,980.23
6. Step 6: Final answer
   x = 17,813.86