Finding the Fourth Proportional to 1,382.52, 1,905.92 and 988.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.52 : 1,905.92 = 988.86 : x
2. Step 2: Convert to fraction form
   1,382.52/1,905.92 = 988.86/x
3. Step 3: Cross multiply
   1,382.52x = 1,905.92 × 988.86
4. Step 4: Simplify right side
   1,382.52x = 1,884,678.52
5. Step 5: Solve for x
   x = 1,884,678.52/1,382.52
6. Step 6: Final answer
   x = 1,363.22