Finding the Fourth Proportional to 67,666.69, 93,389.94 and 38,980.78

Step by Step Solution

1. Step 1: Write the proportion equation
   67,666.69 : 93,389.94 = 38,980.78 : x
2. Step 2: Convert to fraction form
   67,666.69/93,389.94 = 38,980.78/x
3. Step 3: Cross multiply
   67,666.69x = 93,389.94 × 38,980.78
4. Step 4: Simplify right side
   67,666.69x = 3,640,412,705.35
5. Step 5: Solve for x
   x = 3,640,412,705.35/67,666.69
6. Step 6: Final answer
   x = 53,799.18