Finding the Fourth Proportional to 1,402.98, 1,931.94 and 1,009.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.98 : 1,931.94 = 1,009.32 : x
2. Step 2: Convert to fraction form
   1,402.98/1,931.94 = 1,009.32/x
3. Step 3: Cross multiply
   1,402.98x = 1,931.94 × 1,009.32
4. Step 4: Simplify right side
   1,402.98x = 1,949,945.68
5. Step 5: Solve for x
   x = 1,949,945.68/1,402.98
6. Step 6: Final answer
   x = 1,389.86