Finding the Fourth Proportional to 1,507.16, 2,079.83 and 877.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,507.16 : 2,079.83 = 877.72 : x
2. Step 2: Convert to fraction form
   1,507.16/2,079.83 = 877.72/x
3. Step 3: Cross multiply
   1,507.16x = 2,079.83 × 877.72
4. Step 4: Simplify right side
   1,507.16x = 1,825,493.60
5. Step 5: Solve for x
   x = 1,825,493.60/1,507.16
6. Step 6: Final answer
   x = 1,211.21