Finding the Fourth Proportional to 1,314.18, 1,813.82 and 790.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,314.18 : 1,813.82 = 790.30 : x
2. Step 2: Convert to fraction form
   1,314.18/1,813.82 = 790.30/x
3. Step 3: Cross multiply
   1,314.18x = 1,813.82 × 790.30
4. Step 4: Simplify right side
   1,314.18x = 1,433,461.95
5. Step 5: Solve for x
   x = 1,433,461.95/1,314.18
6. Step 6: Final answer
   x = 1,090.77