Finding the Fourth Proportional to 2,079.50, 3,116.54 and 907.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.50 : 3,116.54 = 907.76 : x
2. Step 2: Convert to fraction form
   2,079.50/3,116.54 = 907.76/x
3. Step 3: Cross multiply
   2,079.50x = 3,116.54 × 907.76
4. Step 4: Simplify right side
   2,079.50x = 2,829,080.41
5. Step 5: Solve for x
   x = 2,829,080.41/2,079.50
6. Step 6: Final answer
   x = 1,360.47