Finding the Fourth Proportional to 1,661.31, 2,474.55 and 1,577.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661.31 : 2,474.55 = 1,577.07 : x
2. Step 2: Convert to fraction form
   1,661.31/2,474.55 = 1,577.07/x
3. Step 3: Cross multiply
   1,661.31x = 2,474.55 × 1,577.07
4. Step 4: Simplify right side
   1,661.31x = 3,902,538.57
5. Step 5: Solve for x
   x = 3,902,538.57/1,661.31
6. Step 6: Final answer
   x = 2,349.07