Finding the Fourth Proportional to 72,838.42, 100,545.22 and 56,928

Step by Step Solution

1. Step 1: Write the proportion equation
   72,838.42 : 100,545.22 = 56,928 : x
2. Step 2: Convert to fraction form
   72,838.42/100,545.22 = 56,928/x
3. Step 3: Cross multiply
   72,838.42x = 100,545.22 × 56,928
4. Step 4: Simplify right side
   72,838.42x = 5,723,838,284.16
5. Step 5: Solve for x
   x = 5,723,838,284.16/72,838.42
6. Step 6: Final answer
   x = 78,582.68