Finding the Fourth Proportional to 56,109.92, 77,426.32 and 30,957.80

Step by Step Solution

1. Step 1: Write the proportion equation
   56,109.92 : 77,426.32 = 30,957.80 : x
2. Step 2: Convert to fraction form
   56,109.92/77,426.32 = 30,957.80/x
3. Step 3: Cross multiply
   56,109.92x = 77,426.32 × 30,957.80
4. Step 4: Simplify right side
   56,109.92x = 2,396,948,529.30
5. Step 5: Solve for x
   x = 2,396,948,529.30/56,109.92
6. Step 6: Final answer
   x = 42,718.80