Finding the Fourth Proportional to 1,415.72, 1,955.23 and 1,261.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,415.72 : 1,955.23 = 1,261.15 : x
2. Step 2: Convert to fraction form
   1,415.72/1,955.23 = 1,261.15/x
3. Step 3: Cross multiply
   1,415.72x = 1,955.23 × 1,261.15
4. Step 4: Simplify right side
   1,415.72x = 2,465,830.27
5. Step 5: Solve for x
   x = 2,465,830.27/1,415.72
6. Step 6: Final answer
   x = 1,741.75