Finding the Fourth Proportional to 31,414.37, 43,374.76 and 21,838.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,414.37 : 43,374.76 = 21,838.28 : x
2. Step 2: Convert to fraction form
   31,414.37/43,374.76 = 21,838.28/x
3. Step 3: Cross multiply
   31,414.37x = 43,374.76 × 21,838.28
4. Step 4: Simplify right side
   31,414.37x = 947,229,882.34
5. Step 5: Solve for x
   x = 947,229,882.34/31,414.37
6. Step 6: Final answer
   x = 30,152.76