Finding the Fourth Proportional to 1,217,492, 1,680,144.72 and 680,948

Step by Step Solution

1. Step 1: Write the proportion equation
   1,217,492 : 1,680,144.72 = 680,948 : x
2. Step 2: Convert to fraction form
   1,217,492/1,680,144.72 = 680,948/x
3. Step 3: Cross multiply
   1,217,492x = 1,680,144.72 × 680,948
4. Step 4: Simplify right side
   1,217,492x = 1,144,091,186,794.56
5. Step 5: Solve for x
   x = 1,144,091,186,794.56/1,217,492
6. Step 6: Final answer
   x = 939,711.46