Finding the Fourth Proportional to 1,343.95, 1,854.24 and 784.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,343.95 : 1,854.24 = 784.05 : x
2. Step 2: Convert to fraction form
   1,343.95/1,854.24 = 784.05/x
3. Step 3: Cross multiply
   1,343.95x = 1,854.24 × 784.05
4. Step 4: Simplify right side
   1,343.95x = 1,453,816.87
5. Step 5: Solve for x
   x = 1,453,816.87/1,343.95
6. Step 6: Final answer
   x = 1,081.75