Finding the Fourth Proportional to 707,697, 1,061,725.32 and 209,061

Step by Step Solution

1. Step 1: Write the proportion equation
   707,697 : 1,061,725.32 = 209,061 : x
2. Step 2: Convert to fraction form
   707,697/1,061,725.32 = 209,061/x
3. Step 3: Cross multiply
   707,697x = 1,061,725.32 × 209,061
4. Step 4: Simplify right side
   707,697x = 221,965,357,124.52
5. Step 5: Solve for x
   x = 221,965,357,124.52/707,697
6. Step 6: Final answer
   x = 313,644.62