Finding the Fourth Proportional to 657,153.72, 906,871.50 and 355,347

Step by Step Solution

1. Step 1: Write the proportion equation
   657,153.72 : 906,871.50 = 355,347 : x
2. Step 2: Convert to fraction form
   657,153.72/906,871.50 = 355,347/x
3. Step 3: Cross multiply
   657,153.72x = 906,871.50 × 355,347
4. Step 4: Simplify right side
   657,153.72x = 322,254,066,910.50
5. Step 5: Solve for x
   x = 322,254,066,910.50/657,153.72
6. Step 6: Final answer
   x = 490,378.52