Finding the Fourth Proportional to 22,931.91, 31,642.25 and 13,502.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,931.91 : 31,642.25 = 13,502.30 : x
2. Step 2: Convert to fraction form
   22,931.91/31,642.25 = 13,502.30/x
3. Step 3: Cross multiply
   22,931.91x = 31,642.25 × 13,502.30
4. Step 4: Simplify right side
   22,931.91x = 427,242,926.45
5. Step 5: Solve for x
   x = 427,242,926.45/22,931.91
6. Step 6: Final answer
   x = 18,630.94