Finding the Fourth Proportional to 1,244,499.69, 1,866,946.37 and 445,763.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,244,499.69 : 1,866,946.37 = 445,763.55 : x
2. Step 2: Convert to fraction form
   1,244,499.69/1,866,946.37 = 445,763.55/x
3. Step 3: Cross multiply
   1,244,499.69x = 1,866,946.37 × 445,763.55
4. Step 4: Simplify right side
   1,244,499.69x = 832,216,639,322.00
5. Step 5: Solve for x
   x = 832,216,639,322.00/1,244,499.69
6. Step 6: Final answer
   x = 668,715.83