Finding the Fourth Proportional to 1,630.31, 2,445.69 and 936.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,630.31 : 2,445.69 = 936.86 : x
2. Step 2: Convert to fraction form
   1,630.31/2,445.69 = 936.86/x
3. Step 3: Cross multiply
   1,630.31x = 2,445.69 × 936.86
4. Step 4: Simplify right side
   1,630.31x = 2,291,256.90
5. Step 5: Solve for x
   x = 2,291,256.90/1,630.31
6. Step 6: Final answer
   x = 1,405.42