Finding the Fourth Proportional to 438,111.52, 604,601.69 and 256,954.10

Step by Step Solution

1. Step 1: Write the proportion equation
   438,111.52 : 604,601.69 = 256,954.10 : x
2. Step 2: Convert to fraction form
   438,111.52/604,601.69 = 256,954.10/x
3. Step 3: Cross multiply
   438,111.52x = 604,601.69 × 256,954.10
4. Step 4: Simplify right side
   438,111.52x = 155,354,878,804.65
5. Step 5: Solve for x
   x = 155,354,878,804.65/438,111.52
6. Step 6: Final answer
   x = 354,601.22