Finding the Fourth Proportional to 1,940.84, 2,917.02 and 915.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,940.84 : 2,917.02 = 915.56 : x
2. Step 2: Convert to fraction form
   1,940.84/2,917.02 = 915.56/x
3. Step 3: Cross multiply
   1,940.84x = 2,917.02 × 915.56
4. Step 4: Simplify right side
   1,940.84x = 2,670,706.83
5. Step 5: Solve for x
   x = 2,670,706.83/1,940.84
6. Step 6: Final answer
   x = 1,376.06