Finding the Fourth Proportional to 1,374.64, 1,895.56 and 1,039.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,374.64 : 1,895.56 = 1,039.32 : x
2. Step 2: Convert to fraction form
   1,374.64/1,895.56 = 1,039.32/x
3. Step 3: Cross multiply
   1,374.64x = 1,895.56 × 1,039.32
4. Step 4: Simplify right side
   1,374.64x = 1,970,081.34
5. Step 5: Solve for x
   x = 1,970,081.34/1,374.64
6. Step 6: Final answer
   x = 1,433.16