Finding the Fourth Proportional to 1,147.56, 1,719.05 and 1,086.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.56 : 1,719.05 = 1,086.99 : x
2. Step 2: Convert to fraction form
   1,147.56/1,719.05 = 1,086.99/x
3. Step 3: Cross multiply
   1,147.56x = 1,719.05 × 1,086.99
4. Step 4: Simplify right side
   1,147.56x = 1,868,584.72
5. Step 5: Solve for x
   x = 1,868,584.72/1,147.56
6. Step 6: Final answer
   x = 1,628.31