Finding the Fourth Proportional to 309,496.28, 464,255.42 and 99,106.88

Step by Step Solution

1. Step 1: Write the proportion equation
   309,496.28 : 464,255.42 = 99,106.88 : x
2. Step 2: Convert to fraction form
   309,496.28/464,255.42 = 99,106.88/x
3. Step 3: Cross multiply
   309,496.28x = 464,255.42 × 99,106.88
4. Step 4: Simplify right side
   309,496.28x = 46,010,903,382.48
5. Step 5: Solve for x
   x = 46,010,903,382.48/309,496.28
6. Step 6: Final answer
   x = 148,663.84