Finding the Fourth Proportional to 1,561.47, 2,154.89 and 1,030.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.47 : 2,154.89 = 1,030.82 : x
2. Step 2: Convert to fraction form
   1,561.47/2,154.89 = 1,030.82/x
3. Step 3: Cross multiply
   1,561.47x = 2,154.89 × 1,030.82
4. Step 4: Simplify right side
   1,561.47x = 2,221,298.56
5. Step 5: Solve for x
   x = 2,221,298.56/1,561.47
6. Step 6: Final answer
   x = 1,422.57