Finding the Fourth Proportional to 2,071.50, 3,108.48 and 917.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.50 : 3,108.48 = 917.28 : x
2. Step 2: Convert to fraction form
   2,071.50/3,108.48 = 917.28/x
3. Step 3: Cross multiply
   2,071.50x = 3,108.48 × 917.28
4. Step 4: Simplify right side
   2,071.50x = 2,851,346.53
5. Step 5: Solve for x
   x = 2,851,346.53/2,071.50
6. Step 6: Final answer
   x = 1,376.46