Finding the Fourth Proportional to 49,431, 74,155.82 and 19,851.16

Step by Step Solution

1. Step 1: Write the proportion equation
   49,431 : 74,155.82 = 19,851.16 : x
2. Step 2: Convert to fraction form
   49,431/74,155.82 = 19,851.16/x
3. Step 3: Cross multiply
   49,431x = 74,155.82 × 19,851.16
4. Step 4: Simplify right side
   49,431x = 1,472,079,047.75
5. Step 5: Solve for x
   x = 1,472,079,047.75/49,431
6. Step 6: Final answer
   x = 29,780.48