Finding the Fourth Proportional to 2,172.50, 3,256.10 and 938.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.50 : 3,256.10 = 938.46 : x
2. Step 2: Convert to fraction form
   2,172.50/3,256.10 = 938.46/x
3. Step 3: Cross multiply
   2,172.50x = 3,256.10 × 938.46
4. Step 4: Simplify right side
   2,172.50x = 3,055,719.61
5. Step 5: Solve for x
   x = 3,055,719.61/2,172.50
6. Step 6: Final answer
   x = 1,406.55