Finding the Fourth Proportional to 166,100.86, 229,215.99 and 90,649.90

Step by Step Solution

1. Step 1: Write the proportion equation
   166,100.86 : 229,215.99 = 90,649.90 : x
2. Step 2: Convert to fraction form
   166,100.86/229,215.99 = 90,649.90/x
3. Step 3: Cross multiply
   166,100.86x = 229,215.99 × 90,649.90
4. Step 4: Simplify right side
   166,100.86x = 20,778,406,571.90
5. Step 5: Solve for x
   x = 20,778,406,571.90/166,100.86
6. Step 6: Final answer
   x = 125,095.12