Finding the Fourth Proportional to 92,938.25, 139,328.99 and 40,308.09

Step by Step Solution

1. Step 1: Write the proportion equation
   92,938.25 : 139,328.99 = 40,308.09 : x
2. Step 2: Convert to fraction form
   92,938.25/139,328.99 = 40,308.09/x
3. Step 3: Cross multiply
   92,938.25x = 139,328.99 × 40,308.09
4. Step 4: Simplify right side
   92,938.25x = 5,616,085,569.30
5. Step 5: Solve for x
   x = 5,616,085,569.30/92,938.25
6. Step 6: Final answer
   x = 60,428.14