Finding the Fourth Proportional to 150,665.63, 207,903.42 and 90,234.72

Step by Step Solution

1. Step 1: Write the proportion equation
   150,665.63 : 207,903.42 = 90,234.72 : x
2. Step 2: Convert to fraction form
   150,665.63/207,903.42 = 90,234.72/x
3. Step 3: Cross multiply
   150,665.63x = 207,903.42 × 90,234.72
4. Step 4: Simplify right side
   150,665.63x = 18,760,106,890.74
5. Step 5: Solve for x
   x = 18,760,106,890.74/150,665.63
6. Step 6: Final answer
   x = 124,514.84