Finding the Fourth Proportional to 399,667.79, 599,487.85 and 100,150.99

Step by Step Solution

1. Step 1: Write the proportion equation
   399,667.79 : 599,487.85 = 100,150.99 : x
2. Step 2: Convert to fraction form
   399,667.79/599,487.85 = 100,150.99/x
3. Step 3: Cross multiply
   399,667.79x = 599,487.85 × 100,150.99
4. Step 4: Simplify right side
   399,667.79x = 60,039,301,169.72
5. Step 5: Solve for x
   x = 60,039,301,169.72/399,667.79
6. Step 6: Final answer
   x = 150,223.02