Finding the Fourth Proportional to 78,678.21, 108,577.17 and 42,868.22

Step by Step Solution

1. Step 1: Write the proportion equation
   78,678.21 : 108,577.17 = 42,868.22 : x
2. Step 2: Convert to fraction form
   78,678.21/108,577.17 = 42,868.22/x
3. Step 3: Cross multiply
   78,678.21x = 108,577.17 × 42,868.22
4. Step 4: Simplify right side
   78,678.21x = 4,654,510,010.54
5. Step 5: Solve for x
   x = 4,654,510,010.54/78,678.21
6. Step 6: Final answer
   x = 59,158.82