Finding the Fourth Proportional to 1,019.42, 1,407.55 and 901.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.42 : 1,407.55 = 901.52 : x
2. Step 2: Convert to fraction form
   1,019.42/1,407.55 = 901.52/x
3. Step 3: Cross multiply
   1,019.42x = 1,407.55 × 901.52
4. Step 4: Simplify right side
   1,019.42x = 1,268,935.74
5. Step 5: Solve for x
   x = 1,268,935.74/1,019.42
6. Step 6: Final answer
   x = 1,244.77