Finding the Fourth Proportional to 1,224,002.88, 1,689,120.72 and 680,136.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,224,002.88 : 1,689,120.72 = 680,136.48 : x
2. Step 2: Convert to fraction form
   1,224,002.88/1,689,120.72 = 680,136.48/x
3. Step 3: Cross multiply
   1,224,002.88x = 1,689,120.72 × 680,136.48
4. Step 4: Simplify right side
   1,224,002.88x = 1,148,832,620,795.87
5. Step 5: Solve for x
   x = 1,148,832,620,795.87/1,224,002.88
6. Step 6: Final answer
   x = 938,586.53