Finding the Fourth Proportional to 72,978.91, 100,652.59 and 50,312.71

Step by Step Solution

1. Step 1: Write the proportion equation
   72,978.91 : 100,652.59 = 50,312.71 : x
2. Step 2: Convert to fraction form
   72,978.91/100,652.59 = 50,312.71/x
3. Step 3: Cross multiply
   72,978.91x = 100,652.59 × 50,312.71
4. Step 4: Simplify right side
   72,978.91x = 5,064,103,816.59
5. Step 5: Solve for x
   x = 5,064,103,816.59/72,978.91
6. Step 6: Final answer
   x = 69,391.33