Finding the Fourth Proportional to 150,499.50, 207,721.71 and 90,083.63

Step by Step Solution

1. Step 1: Write the proportion equation
   150,499.50 : 207,721.71 = 90,083.63 : x
2. Step 2: Convert to fraction form
   150,499.50/207,721.71 = 90,083.63/x
3. Step 3: Cross multiply
   150,499.50x = 207,721.71 × 90,083.63
4. Step 4: Simplify right side
   150,499.50x = 18,712,324,628.00
5. Step 5: Solve for x
   x = 18,712,324,628.00/150,499.50
6. Step 6: Final answer
   x = 124,334.80