Finding the Fourth Proportional to 309,411.78, 464,118.03 and 84,774.12

Step by Step Solution

1. Step 1: Write the proportion equation
   309,411.78 : 464,118.03 = 84,774.12 : x
2. Step 2: Convert to fraction form
   309,411.78/464,118.03 = 84,774.12/x
3. Step 3: Cross multiply
   309,411.78x = 464,118.03 × 84,774.12
4. Step 4: Simplify right side
   309,411.78x = 39,345,197,569.38
5. Step 5: Solve for x
   x = 39,345,197,569.38/309,411.78
6. Step 6: Final answer
   x = 127,161.28