Finding the Fourth Proportional to 2,077.93, 3,117.47 and 907.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.93 : 3,117.47 = 907.72 : x
2. Step 2: Convert to fraction form
   2,077.93/3,117.47 = 907.72/x
3. Step 3: Cross multiply
   2,077.93x = 3,117.47 × 907.72
4. Step 4: Simplify right side
   2,077.93x = 2,829,789.87
5. Step 5: Solve for x
   x = 2,829,789.87/2,077.93
6. Step 6: Final answer
   x = 1,361.83