Finding the Fourth Proportional to 78,791.10, 108,729.63 and 42,981.81

Step by Step Solution

1. Step 1: Write the proportion equation
   78,791.10 : 108,729.63 = 42,981.81 : x
2. Step 2: Convert to fraction form
   78,791.10/108,729.63 = 42,981.81/x
3. Step 3: Cross multiply
   78,791.10x = 108,729.63 × 42,981.81
4. Step 4: Simplify right side
   78,791.10x = 4,673,396,298.03
5. Step 5: Solve for x
   x = 4,673,396,298.03/78,791.10
6. Step 6: Final answer
   x = 59,313.76