Finding the Fourth Proportional to 56,289.94, 77,680.42 and 30,796.61

Step by Step Solution

1. Step 1: Write the proportion equation
   56,289.94 : 77,680.42 = 30,796.61 : x
2. Step 2: Convert to fraction form
   56,289.94/77,680.42 = 30,796.61/x
3. Step 3: Cross multiply
   56,289.94x = 77,680.42 × 30,796.61
4. Step 4: Simplify right side
   56,289.94x = 2,392,293,133.98
5. Step 5: Solve for x
   x = 2,392,293,133.98/56,289.94
6. Step 6: Final answer
   x = 42,499.48