Finding the Fourth Proportional to 1,307,061.72, 1,960,594.12 and 408,508.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,307,061.72 : 1,960,594.12 = 408,508.17 : x
2. Step 2: Convert to fraction form
   1,307,061.72/1,960,594.12 = 408,508.17/x
3. Step 3: Cross multiply
   1,307,061.72x = 1,960,594.12 × 408,508.17
4. Step 4: Simplify right side
   1,307,061.72x = 800,918,709,232.37
5. Step 5: Solve for x
   x = 800,918,709,232.37/1,307,061.72
6. Step 6: Final answer
   x = 612,762.73