Finding the Fourth Proportional to 657,152.72, 906,870.12 and 355,346

Step by Step Solution

1. Step 1: Write the proportion equation
   657,152.72 : 906,870.12 = 355,346 : x
2. Step 2: Convert to fraction form
   657,152.72/906,870.12 = 355,346/x
3. Step 3: Cross multiply
   657,152.72x = 906,870.12 × 355,346
4. Step 4: Simplify right side
   657,152.72x = 322,252,669,661.52
5. Step 5: Solve for x
   x = 322,252,669,661.52/657,152.72
6. Step 6: Final answer
   x = 490,377.14