Finding the Fourth Proportional to 78,569.39, 108,422.52 and 42,759.47

Step by Step Solution

1. Step 1: Write the proportion equation
   78,569.39 : 108,422.52 = 42,759.47 : x
2. Step 2: Convert to fraction form
   78,569.39/108,422.52 = 42,759.47/x
3. Step 3: Cross multiply
   78,569.39x = 108,422.52 × 42,759.47
4. Step 4: Simplify right side
   78,569.39x = 4,636,089,491.26
5. Step 5: Solve for x
   x = 4,636,089,491.26/78,569.39
6. Step 6: Final answer
   x = 59,006.31