Finding the Fourth Proportional to 1,078,664.76, 1,617,576.58 and 404,378.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078,664.76 : 1,617,576.58 = 404,378.50 : x
2. Step 2: Convert to fraction form
   1,078,664.76/1,617,576.58 = 404,378.50/x
3. Step 3: Cross multiply
   1,078,664.76x = 1,617,576.58 × 404,378.50
4. Step 4: Simplify right side
   1,078,664.76x = 654,113,191,055.53
5. Step 5: Solve for x
   x = 654,113,191,055.53/1,078,664.76
6. Step 6: Final answer
   x = 606,410.09