Finding the Fourth Proportional to 1,431.91, 1,975.17 and 901.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.91 : 1,975.17 = 901.09 : x
2. Step 2: Convert to fraction form
   1,431.91/1,975.17 = 901.09/x
3. Step 3: Cross multiply
   1,431.91x = 1,975.17 × 901.09
4. Step 4: Simplify right side
   1,431.91x = 1,779,805.94
5. Step 5: Solve for x
   x = 1,779,805.94/1,431.91
6. Step 6: Final answer
   x = 1,242.96