Finding the Fourth Proportional to 1,561.53, 2,154.72 and 862.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.53 : 2,154.72 = 862.92 : x
2. Step 2: Convert to fraction form
   1,561.53/2,154.72 = 862.92/x
3. Step 3: Cross multiply
   1,561.53x = 2,154.72 × 862.92
4. Step 4: Simplify right side
   1,561.53x = 1,859,350.98
5. Step 5: Solve for x
   x = 1,859,350.98/1,561.53
6. Step 6: Final answer
   x = 1,190.72