Finding the Fourth Proportional to 51,139.63, 70,571.37 and 49,630.60

Step by Step Solution

1. Step 1: Write the proportion equation
   51,139.63 : 70,571.37 = 49,630.60 : x
2. Step 2: Convert to fraction form
   51,139.63/70,571.37 = 49,630.60/x
3. Step 3: Cross multiply
   51,139.63x = 70,571.37 × 49,630.60
4. Step 4: Simplify right side
   51,139.63x = 3,502,499,445.61
5. Step 5: Solve for x
   x = 3,502,499,445.61/51,139.63
6. Step 6: Final answer
   x = 68,488.95