Finding the Fourth Proportional to 639,547.02, 882,569.61 and 353,061

Step by Step Solution

1. Step 1: Write the proportion equation
   639,547.02 : 882,569.61 = 353,061 : x
2. Step 2: Convert to fraction form
   639,547.02/882,569.61 = 353,061/x
3. Step 3: Cross multiply
   639,547.02x = 882,569.61 × 353,061
4. Step 4: Simplify right side
   639,547.02x = 311,600,909,076.21
5. Step 5: Solve for x
   x = 311,600,909,076.21/639,547.02
6. Step 6: Final answer
   x = 487,221.27