Finding the Fourth Proportional to 78,309.62, 108,067.62 and 42,499.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,309.62 : 108,067.62 = 42,499.62 : x
2. Step 2: Convert to fraction form
   78,309.62/108,067.62 = 42,499.62/x
3. Step 3: Cross multiply
   78,309.62x = 108,067.62 × 42,499.62
4. Step 4: Simplify right side
   78,309.62x = 4,592,832,784.30
5. Step 5: Solve for x
   x = 4,592,832,784.30/78,309.62
6. Step 6: Final answer
   x = 58,649.67