Finding the Fourth Proportional to 309,496.78, 464,256.17 and 99,107.38

Step by Step Solution

1. Step 1: Write the proportion equation
   309,496.78 : 464,256.17 = 99,107.38 : x
2. Step 2: Convert to fraction form
   309,496.78/464,256.17 = 99,107.38/x
3. Step 3: Cross multiply
   309,496.78x = 464,256.17 × 99,107.38
4. Step 4: Simplify right side
   309,496.78x = 46,011,209,840.72
5. Step 5: Solve for x
   x = 46,011,209,840.72/309,496.78
6. Step 6: Final answer
   x = 148,664.59