Finding the Fourth Proportional to 1,055,078.50, 1,582,619.73 and 256,360.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055,078.50 : 1,582,619.73 = 256,360.72 : x
2. Step 2: Convert to fraction form
   1,055,078.50/1,582,619.73 = 256,360.72/x
3. Step 3: Cross multiply
   1,055,078.50x = 1,582,619.73 × 256,360.72
4. Step 4: Simplify right side
   1,055,078.50x = 405,721,528,551.10
5. Step 5: Solve for x
   x = 405,721,528,551.10/1,055,078.50
6. Step 6: Final answer
   x = 384,541.56