Finding the Fourth Proportional to 22,200.42, 30,637.50 and 12,768.99

Step by Step Solution

1. Step 1: Write the proportion equation
   22,200.42 : 30,637.50 = 12,768.99 : x
2. Step 2: Convert to fraction form
   22,200.42/30,637.50 = 12,768.99/x
3. Step 3: Cross multiply
   22,200.42x = 30,637.50 × 12,768.99
4. Step 4: Simplify right side
   22,200.42x = 391,209,931.13
5. Step 5: Solve for x
   x = 391,209,931.13/22,200.42
6. Step 6: Final answer
   x = 17,621.74