Finding the Fourth Proportional to 23,077.71, 31,847.28 and 13,389.05

Step by Step Solution

1. Step 1: Write the proportion equation
   23,077.71 : 31,847.28 = 13,389.05 : x
2. Step 2: Convert to fraction form
   23,077.71/31,847.28 = 13,389.05/x
3. Step 3: Cross multiply
   23,077.71x = 31,847.28 × 13,389.05
4. Step 4: Simplify right side
   23,077.71x = 426,404,665.05
5. Step 5: Solve for x
   x = 426,404,665.05/23,077.71
6. Step 6: Final answer
   x = 18,476.91