Finding the Fourth Proportional to 168,900.89, 253,351.39 and 42,542.18

Step by Step Solution

1. Step 1: Write the proportion equation
   168,900.89 : 253,351.39 = 42,542.18 : x
2. Step 2: Convert to fraction form
   168,900.89/253,351.39 = 42,542.18/x
3. Step 3: Cross multiply
   168,900.89x = 253,351.39 × 42,542.18
4. Step 4: Simplify right side
   168,900.89x = 10,778,119,063.52
5. Step 5: Solve for x
   x = 10,778,119,063.52/168,900.89
6. Step 6: Final answer
   x = 63,813.28