Finding the Fourth Proportional to 78,488.14, 108,313.10 and 42,678.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,488.14 : 108,313.10 = 42,678.18 : x
2. Step 2: Convert to fraction form
   78,488.14/108,313.10 = 42,678.18/x
3. Step 3: Cross multiply
   78,488.14x = 108,313.10 × 42,678.18
4. Step 4: Simplify right side
   78,488.14x = 4,622,605,978.16
5. Step 5: Solve for x
   x = 4,622,605,978.16/78,488.14
6. Step 6: Final answer
   x = 58,895.60