Finding the Fourth Proportional to 1,272.27, 1,906.88 and 901.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272.27 : 1,906.88 = 901.50 : x
2. Step 2: Convert to fraction form
   1,272.27/1,906.88 = 901.50/x
3. Step 3: Cross multiply
   1,272.27x = 1,906.88 × 901.50
4. Step 4: Simplify right side
   1,272.27x = 1,719,047.81
5. Step 5: Solve for x
   x = 1,719,047.81/1,272.27
6. Step 6: Final answer
   x = 1,351.17