Finding the Fourth Proportional to 78,727.56, 108,646.41 and 42,918.17

Step by Step Solution

1. Step 1: Write the proportion equation
   78,727.56 : 108,646.41 = 42,918.17 : x
2. Step 2: Convert to fraction form
   78,727.56/108,646.41 = 42,918.17/x
3. Step 3: Cross multiply
   78,727.56x = 108,646.41 × 42,918.17
4. Step 4: Simplify right side
   78,727.56x = 4,662,905,323.12
5. Step 5: Solve for x
   x = 4,662,905,323.12/78,727.56
6. Step 6: Final answer
   x = 59,228.37