Finding the Fourth Proportional to 78,569.39, 108,423.67 and 42,758.63

Step by Step Solution

1. Step 1: Write the proportion equation
   78,569.39 : 108,423.67 = 42,758.63 : x
2. Step 2: Convert to fraction form
   78,569.39/108,423.67 = 42,758.63/x
3. Step 3: Cross multiply
   78,569.39x = 108,423.67 × 42,758.63
4. Step 4: Simplify right side
   78,569.39x = 4,636,046,832.86
5. Step 5: Solve for x
   x = 4,636,046,832.86/78,569.39
6. Step 6: Final answer
   x = 59,005.77