Finding the Fourth Proportional to 2,071.76, 3,108.04 and 917.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.76 : 3,108.04 = 917.52 : x
2. Step 2: Convert to fraction form
   2,071.76/3,108.04 = 917.52/x
3. Step 3: Cross multiply
   2,071.76x = 3,108.04 × 917.52
4. Step 4: Simplify right side
   2,071.76x = 2,851,688.86
5. Step 5: Solve for x
   x = 2,851,688.86/2,071.76
6. Step 6: Final answer
   x = 1,376.46