Finding the Fourth Proportional to 1,970.47, 2,719.22 and 1,086.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.47 : 2,719.22 = 1,086.33 : x
2. Step 2: Convert to fraction form
   1,970.47/2,719.22 = 1,086.33/x
3. Step 3: Cross multiply
   1,970.47x = 2,719.22 × 1,086.33
4. Step 4: Simplify right side
   1,970.47x = 2,953,970.26
5. Step 5: Solve for x
   x = 2,953,970.26/1,970.47
6. Step 6: Final answer
   x = 1,499.12