Finding the Fourth Proportional to 78,749.36, 108,671.74 and 42,940.06

Step by Step Solution

1. Step 1: Write the proportion equation
   78,749.36 : 108,671.74 = 42,940.06 : x
2. Step 2: Convert to fraction form
   78,749.36/108,671.74 = 42,940.06/x
3. Step 3: Cross multiply
   78,749.36x = 108,671.74 × 42,940.06
4. Step 4: Simplify right side
   78,749.36x = 4,666,371,035.90
5. Step 5: Solve for x
   x = 4,666,371,035.90/78,749.36
6. Step 6: Final answer
   x = 59,255.99