Finding the Fourth Proportional to 67,890.78, 93,690.33 and 37,678.05

Step by Step Solution

1. Step 1: Write the proportion equation
   67,890.78 : 93,690.33 = 37,678.05 : x
2. Step 2: Convert to fraction form
   67,890.78/93,690.33 = 37,678.05/x
3. Step 3: Cross multiply
   67,890.78x = 93,690.33 × 37,678.05
4. Step 4: Simplify right side
   67,890.78x = 3,530,068,938.26
5. Step 5: Solve for x
   x = 3,530,068,938.26/67,890.78
6. Step 6: Final answer
   x = 51,996.29