Finding the Fourth Proportional to 1,308.06, 1,961.91 and 760.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.06 : 1,961.91 = 760.50 : x
2. Step 2: Convert to fraction form
   1,308.06/1,961.91 = 760.50/x
3. Step 3: Cross multiply
   1,308.06x = 1,961.91 × 760.50
4. Step 4: Simplify right side
   1,308.06x = 1,492,032.56
5. Step 5: Solve for x
   x = 1,492,032.56/1,308.06
6. Step 6: Final answer
   x = 1,140.65