Finding the Fourth Proportional to 1,415.58, 1,952.13 and 1,121.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,415.58 : 1,952.13 = 1,121.55 : x
2. Step 2: Convert to fraction form
   1,415.58/1,952.13 = 1,121.55/x
3. Step 3: Cross multiply
   1,415.58x = 1,952.13 × 1,121.55
4. Step 4: Simplify right side
   1,415.58x = 2,189,411.40
5. Step 5: Solve for x
   x = 2,189,411.40/1,415.58
6. Step 6: Final answer
   x = 1,546.65