Finding the Fourth Proportional to 1,425.78, 1,967.31 and 901.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,425.78 : 1,967.31 = 901.98 : x
2. Step 2: Convert to fraction form
   1,425.78/1,967.31 = 901.98/x
3. Step 3: Cross multiply
   1,425.78x = 1,967.31 × 901.98
4. Step 4: Simplify right side
   1,425.78x = 1,774,474.27
5. Step 5: Solve for x
   x = 1,774,474.27/1,425.78
6. Step 6: Final answer
   x = 1,244.56