Finding the Fourth Proportional to 78,724.83, 118,086.81 and 19,560.48

Step by Step Solution

1. Step 1: Write the proportion equation
   78,724.83 : 118,086.81 = 19,560.48 : x
2. Step 2: Convert to fraction form
   78,724.83/118,086.81 = 19,560.48/x
3. Step 3: Cross multiply
   78,724.83x = 118,086.81 × 19,560.48
4. Step 4: Simplify right side
   78,724.83x = 2,309,834,685.27
5. Step 5: Solve for x
   x = 2,309,834,685.27/78,724.83
6. Step 6: Final answer
   x = 29,340.61