Finding the Fourth Proportional to 1,343.55, 1,854.15 and 783.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,343.55 : 1,854.15 = 783.93 : x
2. Step 2: Convert to fraction form
   1,343.55/1,854.15 = 783.93/x
3. Step 3: Cross multiply
   1,343.55x = 1,854.15 × 783.93
4. Step 4: Simplify right side
   1,343.55x = 1,453,523.81
5. Step 5: Solve for x
   x = 1,453,523.81/1,343.55
6. Step 6: Final answer
   x = 1,081.85