Finding the Fourth Proportional to 1,344.59, 1,855.20 and 784.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,344.59 : 1,855.20 = 784.74 : x
2. Step 2: Convert to fraction form
   1,344.59/1,855.20 = 784.74/x
3. Step 3: Cross multiply
   1,344.59x = 1,855.20 × 784.74
4. Step 4: Simplify right side
   1,344.59x = 1,455,840.37
5. Step 5: Solve for x
   x = 1,455,840.37/1,344.59
6. Step 6: Final answer
   x = 1,082.74