Finding the Fourth Proportional to 1,431.42, 1,974.15 and 907.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.42 : 1,974.15 = 907.62 : x
2. Step 2: Convert to fraction form
   1,431.42/1,974.15 = 907.62/x
3. Step 3: Cross multiply
   1,431.42x = 1,974.15 × 907.62
4. Step 4: Simplify right side
   1,431.42x = 1,791,778.02
5. Step 5: Solve for x
   x = 1,791,778.02/1,431.42
6. Step 6: Final answer
   x = 1,251.75