Finding the Fourth Proportional to 49,839.08, 74,435.60 and 45,149.72

Step by Step Solution

1. Step 1: Write the proportion equation
   49,839.08 : 74,435.60 = 45,149.72 : x
2. Step 2: Convert to fraction form
   49,839.08/74,435.60 = 45,149.72/x
3. Step 3: Cross multiply
   49,839.08x = 74,435.60 × 45,149.72
4. Step 4: Simplify right side
   49,839.08x = 3,360,746,498.03
5. Step 5: Solve for x
   x = 3,360,746,498.03/49,839.08
6. Step 6: Final answer
   x = 67,431.95