Finding the Fourth Proportional to 369,622.25, 554,433.91 and 89,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   369,622.25 : 554,433.91 = 89,139.50 : x
2. Step 2: Convert to fraction form
   369,622.25/554,433.91 = 89,139.50/x
3. Step 3: Cross multiply
   369,622.25x = 554,433.91 × 89,139.50
4. Step 4: Simplify right side
   369,622.25x = 49,421,958,525.43
5. Step 5: Solve for x
   x = 49,421,958,525.43/369,622.25
6. Step 6: Final answer
   x = 133,709.37