Finding the Fourth Proportional to 78,791.28, 108,733.40 and 42,982.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,791.28 : 108,733.40 = 42,982.56 : x
2. Step 2: Convert to fraction form
   78,791.28/108,733.40 = 42,982.56/x
3. Step 3: Cross multiply
   78,791.28x = 108,733.40 × 42,982.56
4. Step 4: Simplify right side
   78,791.28x = 4,673,639,889.50
5. Step 5: Solve for x
   x = 4,673,639,889.50/78,791.28
6. Step 6: Final answer
   x = 59,316.71