Finding the Fourth Proportional to 1,343.62, 1,853.88 and 783.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,343.62 : 1,853.88 = 783.86 : x
2. Step 2: Convert to fraction form
   1,343.62/1,853.88 = 783.86/x
3. Step 3: Cross multiply
   1,343.62x = 1,853.88 × 783.86
4. Step 4: Simplify right side
   1,343.62x = 1,453,182.38
5. Step 5: Solve for x
   x = 1,453,182.38/1,343.62
6. Step 6: Final answer
   x = 1,081.55