Finding the Fourth Proportional to 150,920.45, 208,127.34 and 99,146.10

Step by Step Solution

1. Step 1: Write the proportion equation
   150,920.45 : 208,127.34 = 99,146.10 : x
2. Step 2: Convert to fraction form
   150,920.45/208,127.34 = 99,146.10/x
3. Step 3: Cross multiply
   150,920.45x = 208,127.34 × 99,146.10
4. Step 4: Simplify right side
   150,920.45x = 20,635,014,064.37
5. Step 5: Solve for x
   x = 20,635,014,064.37/150,920.45
6. Step 6: Final answer
   x = 136,727.75