Finding the Fourth Proportional to 78,678.16, 108,577.10 and 42,868.14

Step by Step Solution

1. Step 1: Write the proportion equation
   78,678.16 : 108,577.10 = 42,868.14 : x
2. Step 2: Convert to fraction form
   78,678.16/108,577.10 = 42,868.14/x
3. Step 3: Cross multiply
   78,678.16x = 108,577.10 × 42,868.14
4. Step 4: Simplify right side
   78,678.16x = 4,654,498,323.59
5. Step 5: Solve for x
   x = 4,654,498,323.59/78,678.16
6. Step 6: Final answer
   x = 59,158.71