Finding the Fourth Proportional to 1,224,111.24, 1,689,165.96 and 680,212.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,224,111.24 : 1,689,165.96 = 680,212.56 : x
2. Step 2: Convert to fraction form
   1,224,111.24/1,689,165.96 = 680,212.56/x
3. Step 3: Cross multiply
   1,224,111.24x = 1,689,165.96 × 680,212.56
4. Step 4: Simplify right side
   1,224,111.24x = 1,148,991,901,916.46
5. Step 5: Solve for x
   x = 1,148,991,901,916.46/1,224,111.24
6. Step 6: Final answer
   x = 938,633.57