Finding the Fourth Proportional to 1,308.58, 1,806.78 and 1,061.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.58 : 1,806.78 = 1,061.02 : x
2. Step 2: Convert to fraction form
   1,308.58/1,806.78 = 1,061.02/x
3. Step 3: Cross multiply
   1,308.58x = 1,806.78 × 1,061.02
4. Step 4: Simplify right side
   1,308.58x = 1,917,029.72
5. Step 5: Solve for x
   x = 1,917,029.72/1,308.58
6. Step 6: Final answer
   x = 1,464.97