Finding the Fourth Proportional to 23,426.28, 34,989.60 and 21,201.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,426.28 : 34,989.60 = 21,201.72 : x
2. Step 2: Convert to fraction form
   23,426.28/34,989.60 = 21,201.72/x
3. Step 3: Cross multiply
   23,426.28x = 34,989.60 × 21,201.72
4. Step 4: Simplify right side
   23,426.28x = 741,839,702.11
5. Step 5: Solve for x
   x = 741,839,702.11/23,426.28
6. Step 6: Final answer
   x = 31,666.99