Finding the Fourth Proportional to 78,464.18, 108,279.29 and 42,655.09

Step by Step Solution

1. Step 1: Write the proportion equation
   78,464.18 : 108,279.29 = 42,655.09 : x
2. Step 2: Convert to fraction form
   78,464.18/108,279.29 = 42,655.09/x
3. Step 3: Cross multiply
   78,464.18x = 108,279.29 × 42,655.09
4. Step 4: Simplify right side
   78,464.18x = 4,618,662,860.09
5. Step 5: Solve for x
   x = 4,618,662,860.09/78,464.18
6. Step 6: Final answer
   x = 58,863.33