Finding the Fourth Proportional to 49,845.42, 68,792.16 and 30,721.32

Step by Step Solution

1. Step 1: Write the proportion equation
   49,845.42 : 68,792.16 = 30,721.32 : x
2. Step 2: Convert to fraction form
   49,845.42/68,792.16 = 30,721.32/x
3. Step 3: Cross multiply
   49,845.42x = 68,792.16 × 30,721.32
4. Step 4: Simplify right side
   49,845.42x = 2,113,385,960.85
5. Step 5: Solve for x
   x = 2,113,385,960.85/49,845.42
6. Step 6: Final answer
   x = 42,398.80