Finding the Fourth Proportional to 78,618.20, 108,493.63 and 42,808.03

Step by Step Solution

1. Step 1: Write the proportion equation
   78,618.20 : 108,493.63 = 42,808.03 : x
2. Step 2: Convert to fraction form
   78,618.20/108,493.63 = 42,808.03/x
3. Step 3: Cross multiply
   78,618.20x = 108,493.63 × 42,808.03
4. Step 4: Simplify right side
   78,618.20x = 4,644,398,189.59
5. Step 5: Solve for x
   x = 4,644,398,189.59/78,618.20
6. Step 6: Final answer
   x = 59,075.36