Finding the Fourth Proportional to 78,678.02, 108,576.91 and 42,868.02

Step by Step Solution

1. Step 1: Write the proportion equation
   78,678.02 : 108,576.91 = 42,868.02 : x
2. Step 2: Convert to fraction form
   78,678.02/108,576.91 = 42,868.02/x
3. Step 3: Cross multiply
   78,678.02x = 108,576.91 × 42,868.02
4. Step 4: Simplify right side
   78,678.02x = 4,654,477,149.42
5. Step 5: Solve for x
   x = 4,654,477,149.42/78,678.02
6. Step 6: Final answer
   x = 59,158.54