Finding the Fourth Proportional to 1,314.56, 1,814.34 and 790.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,314.56 : 1,814.34 = 790.76 : x
2. Step 2: Convert to fraction form
   1,314.56/1,814.34 = 790.76/x
3. Step 3: Cross multiply
   1,314.56x = 1,814.34 × 790.76
4. Step 4: Simplify right side
   1,314.56x = 1,434,707.50
5. Step 5: Solve for x
   x = 1,434,707.50/1,314.56
6. Step 6: Final answer
   x = 1,091.40