Finding the Fourth Proportional to 50,415, 69,572.70 and 28,064.28

Step by Step Solution

1. Step 1: Write the proportion equation
   50,415 : 69,572.70 = 28,064.28 : x
2. Step 2: Convert to fraction form
   50,415/69,572.70 = 28,064.28/x
3. Step 3: Cross multiply
   50,415x = 69,572.70 × 28,064.28
4. Step 4: Simplify right side
   50,415x = 1,952,507,733.16
5. Step 5: Solve for x
   x = 1,952,507,733.16/50,415
6. Step 6: Final answer
   x = 38,728.71