Finding the Fourth Proportional to 382,908.72, 574,363.16 and 172,300.64

Step by Step Solution

1. Step 1: Write the proportion equation
   382,908.72 : 574,363.16 = 172,300.64 : x
2. Step 2: Convert to fraction form
   382,908.72/574,363.16 = 172,300.64/x
3. Step 3: Cross multiply
   382,908.72x = 574,363.16 × 172,300.64
4. Step 4: Simplify right side
   382,908.72x = 98,963,140,060.42
5. Step 5: Solve for x
   x = 98,963,140,060.42/382,908.72
6. Step 6: Final answer
   x = 258,451.00