Finding the Fourth Proportional to 1,374.25, 1,896.48 and 784.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,374.25 : 1,896.48 = 784.78 : x
2. Step 2: Convert to fraction form
   1,374.25/1,896.48 = 784.78/x
3. Step 3: Cross multiply
   1,374.25x = 1,896.48 × 784.78
4. Step 4: Simplify right side
   1,374.25x = 1,488,327.71
5. Step 5: Solve for x
   x = 1,488,327.71/1,374.25
6. Step 6: Final answer
   x = 1,083.01