Finding the Fourth Proportional to 1,113.41, 1,670.34 and 766.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.41 : 1,670.34 = 766.91 : x
2. Step 2: Convert to fraction form
   1,113.41/1,670.34 = 766.91/x
3. Step 3: Cross multiply
   1,113.41x = 1,670.34 × 766.91
4. Step 4: Simplify right side
   1,113.41x = 1,280,992.10
5. Step 5: Solve for x
   x = 1,280,992.10/1,113.41
6. Step 6: Final answer
   x = 1,150.52