Finding the Fourth Proportional to 667,477.72, 921,113.82 and 361,547.02

Step by Step Solution

1. Step 1: Write the proportion equation
   667,477.72 : 921,113.82 = 361,547.02 : x
2. Step 2: Convert to fraction form
   667,477.72/921,113.82 = 361,547.02/x
3. Step 3: Cross multiply
   667,477.72x = 921,113.82 × 361,547.02
4. Step 4: Simplify right side
   667,477.72x = 333,025,956,701.82
5. Step 5: Solve for x
   x = 333,025,956,701.82/667,477.72
6. Step 6: Final answer
   x = 498,931.94