Finding the Fourth Proportional to 56,454.48, 77,906.76 and 30,960.18

Step by Step Solution

1. Step 1: Write the proportion equation
   56,454.48 : 77,906.76 = 30,960.18 : x
2. Step 2: Convert to fraction form
   56,454.48/77,906.76 = 30,960.18/x
3. Step 3: Cross multiply
   56,454.48x = 77,906.76 × 30,960.18
4. Step 4: Simplify right side
   56,454.48x = 2,412,007,312.82
5. Step 5: Solve for x
   x = 2,412,007,312.82/56,454.48
6. Step 6: Final answer
   x = 42,724.82