Finding the Fourth Proportional to 1,561.77, 2,339.42 and 740.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.77 : 2,339.42 = 740.70 : x
2. Step 2: Convert to fraction form
   1,561.77/2,339.42 = 740.70/x
3. Step 3: Cross multiply
   1,561.77x = 2,339.42 × 740.70
4. Step 4: Simplify right side
   1,561.77x = 1,732,804.69
5. Step 5: Solve for x
   x = 1,732,804.69/1,561.77
6. Step 6: Final answer
   x = 1,109.51