Finding the Fourth Proportional to 1,224,113.24, 1,689,168.72 and 680,214.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,224,113.24 : 1,689,168.72 = 680,214.56 : x
2. Step 2: Convert to fraction form
   1,224,113.24/1,689,168.72 = 680,214.56/x
3. Step 3: Cross multiply
   1,224,113.24x = 1,689,168.72 × 680,214.56
4. Step 4: Simplify right side
   1,224,113.24x = 1,148,997,157,640.56
5. Step 5: Solve for x
   x = 1,148,997,157,640.56/1,224,113.24
6. Step 6: Final answer
   x = 938,636.33