Finding the Fourth Proportional to 22,490.63, 31,038.00 and 13,997.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,490.63 : 31,038.00 = 13,997.78 : x
2. Step 2: Convert to fraction form
   22,490.63/31,038.00 = 13,997.78/x
3. Step 3: Cross multiply
   22,490.63x = 31,038.00 × 13,997.78
4. Step 4: Simplify right side
   22,490.63x = 434,463,120.74
5. Step 5: Solve for x
   x = 434,463,120.74/22,490.63
6. Step 6: Final answer
   x = 19,317.51