Finding the Fourth Proportional to 138,020.71, 207,074.81 and 49,272.25

Step by Step Solution

1. Step 1: Write the proportion equation
   138,020.71 : 207,074.81 = 49,272.25 : x
2. Step 2: Convert to fraction form
   138,020.71/207,074.81 = 49,272.25/x
3. Step 3: Cross multiply
   138,020.71x = 207,074.81 × 49,272.25
4. Step 4: Simplify right side
   138,020.71x = 10,203,041,807.02
5. Step 5: Solve for x
   x = 10,203,041,807.02/138,020.71
6. Step 6: Final answer
   x = 73,923.99