Finding the Fourth Proportional to 1,343.34, 1,853.90 and 783.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,343.34 : 1,853.90 = 783.99 : x
2. Step 2: Convert to fraction form
   1,343.34/1,853.90 = 783.99/x
3. Step 3: Cross multiply
   1,343.34x = 1,853.90 × 783.99
4. Step 4: Simplify right side
   1,343.34x = 1,453,435.14
5. Step 5: Solve for x
   x = 1,453,435.14/1,343.34
6. Step 6: Final answer
   x = 1,081.96