Finding the Fourth Proportional to 1,439.15, 1,985.04 and 907.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.15 : 1,985.04 = 907.52 : x
2. Step 2: Convert to fraction form
   1,439.15/1,985.04 = 907.52/x
3. Step 3: Cross multiply
   1,439.15x = 1,985.04 × 907.52
4. Step 4: Simplify right side
   1,439.15x = 1,801,453.58
5. Step 5: Solve for x
   x = 1,801,453.58/1,439.15
6. Step 6: Final answer
   x = 1,251.75