Finding the Fourth Proportional to 80,681.74, 121,019.82 and 30,760

Step by Step Solution

1. Step 1: Write the proportion equation
   80,681.74 : 121,019.82 = 30,760 : x
2. Step 2: Convert to fraction form
   80,681.74/121,019.82 = 30,760/x
3. Step 3: Cross multiply
   80,681.74x = 121,019.82 × 30,760
4. Step 4: Simplify right side
   80,681.74x = 3,722,569,663.20
5. Step 5: Solve for x
   x = 3,722,569,663.20/80,681.74
6. Step 6: Final answer
   x = 46,138.94