Finding the Fourth Proportional to 72,981.92, 100,656.72 and 50,315.70

Step by Step Solution

1. Step 1: Write the proportion equation
   72,981.92 : 100,656.72 = 50,315.70 : x
2. Step 2: Convert to fraction form
   72,981.92/100,656.72 = 50,315.70/x
3. Step 3: Cross multiply
   72,981.92x = 100,656.72 × 50,315.70
4. Step 4: Simplify right side
   72,981.92x = 5,064,613,326.50
5. Step 5: Solve for x
   x = 5,064,613,326.50/72,981.92
6. Step 6: Final answer
   x = 69,395.45