Finding the Fourth Proportional to 1,661.51, 2,292.86 and 915.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661.51 : 2,292.86 = 915.46 : x
2. Step 2: Convert to fraction form
   1,661.51/2,292.86 = 915.46/x
3. Step 3: Cross multiply
   1,661.51x = 2,292.86 × 915.46
4. Step 4: Simplify right side
   1,661.51x = 2,099,018.17
5. Step 5: Solve for x
   x = 2,099,018.17/1,661.51
6. Step 6: Final answer
   x = 1,263.32