Finding the Fourth Proportional to 1,407.32, 1,940.78 and 1,113.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.32 : 1,940.78 = 1,113.29 : x
2. Step 2: Convert to fraction form
   1,407.32/1,940.78 = 1,113.29/x
3. Step 3: Cross multiply
   1,407.32x = 1,940.78 × 1,113.29
4. Step 4: Simplify right side
   1,407.32x = 2,160,644.05
5. Step 5: Solve for x
   x = 2,160,644.05/1,407.32
6. Step 6: Final answer
   x = 1,535.30