Finding the Fourth Proportional to 78,609.69, 108,478.54 and 42,798.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,609.69 : 108,478.54 = 42,798.88 : x
2. Step 2: Convert to fraction form
   78,609.69/108,478.54 = 42,798.88/x
3. Step 3: Cross multiply
   78,609.69x = 108,478.54 × 42,798.88
4. Step 4: Simplify right side
   78,609.69x = 4,642,760,205.13
5. Step 5: Solve for x
   x = 4,642,760,205.13/78,609.69
6. Step 6: Final answer
   x = 59,060.91