Finding the Fourth Proportional to 78,569.28, 108,423.53 and 42,758.53

Step by Step Solution

1. Step 1: Write the proportion equation
   78,569.28 : 108,423.53 = 42,758.53 : x
2. Step 2: Convert to fraction form
   78,569.28/108,423.53 = 42,758.53/x
3. Step 3: Cross multiply
   78,569.28x = 108,423.53 × 42,758.53
4. Step 4: Simplify right side
   78,569.28x = 4,636,030,164.65
5. Step 5: Solve for x
   x = 4,636,030,164.65/78,569.28
6. Step 6: Final answer
   x = 59,005.63