Finding the Fourth Proportional to 49,885.47, 74,387.16 and 49,440.78

Step by Step Solution

1. Step 1: Write the proportion equation
   49,885.47 : 74,387.16 = 49,440.78 : x
2. Step 2: Convert to fraction form
   49,885.47/74,387.16 = 49,440.78/x
3. Step 3: Cross multiply
   49,885.47x = 74,387.16 × 49,440.78
4. Step 4: Simplify right side
   49,885.47x = 3,677,759,212.38
5. Step 5: Solve for x
   x = 3,677,759,212.38/49,885.47
6. Step 6: Final answer
   x = 73,724.06