Finding the Fourth Proportional to 80,803.86, 121,256.27 and 30,888.18

Step by Step Solution

1. Step 1: Write the proportion equation
   80,803.86 : 121,256.27 = 30,888.18 : x
2. Step 2: Convert to fraction form
   80,803.86/121,256.27 = 30,888.18/x
3. Step 3: Cross multiply
   80,803.86x = 121,256.27 × 30,888.18
4. Step 4: Simplify right side
   80,803.86x = 3,745,385,493.89
5. Step 5: Solve for x
   x = 3,745,385,493.89/80,803.86
6. Step 6: Final answer
   x = 46,351.57