Finding the Fourth Proportional to 2,013.84, 3,019.95 and 917.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.84 : 3,019.95 = 917.91 : x
2. Step 2: Convert to fraction form
   2,013.84/3,019.95 = 917.91/x
3. Step 3: Cross multiply
   2,013.84x = 3,019.95 × 917.91
4. Step 4: Simplify right side
   2,013.84x = 2,772,042.30
5. Step 5: Solve for x
   x = 2,772,042.30/2,013.84
6. Step 6: Final answer
   x = 1,376.50