Finding the Fourth Proportional to 1,432.52, 1,975.72 and 990.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.52 : 1,975.72 = 990.32 : x
2. Step 2: Convert to fraction form
   1,432.52/1,975.72 = 990.32/x
3. Step 3: Cross multiply
   1,432.52x = 1,975.72 × 990.32
4. Step 4: Simplify right side
   1,432.52x = 1,956,595.03
5. Step 5: Solve for x
   x = 1,956,595.03/1,432.52
6. Step 6: Final answer
   x = 1,365.84