Finding the Fourth Proportional to 1,618,946.72, 2,428,537.44 and 621,674.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618,946.72 : 2,428,537.44 = 621,674.72 : x
2. Step 2: Convert to fraction form
   1,618,946.72/2,428,537.44 = 621,674.72/x
3. Step 3: Cross multiply
   1,618,946.72x = 2,428,537.44 × 621,674.72
4. Step 4: Simplify right side
   1,618,946.72x = 1,509,760,333,021.52
5. Step 5: Solve for x
   x = 1,509,760,333,021.52/1,618,946.72
6. Step 6: Final answer
   x = 932,557.15