Finding the Fourth Proportional to 1,561.21, 2,342.72 and 1,440.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.21 : 2,342.72 = 1,440.93 : x
2. Step 2: Convert to fraction form
   1,561.21/2,342.72 = 1,440.93/x
3. Step 3: Cross multiply
   1,561.21x = 2,342.72 × 1,440.93
4. Step 4: Simplify right side
   1,561.21x = 3,375,695.53
5. Step 5: Solve for x
   x = 3,375,695.53/1,561.21
6. Step 6: Final answer
   x = 2,162.23