Finding the Fourth Proportional to 1,562,391.42, 2,156,117.13 and 917,838.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562,391.42 : 2,156,117.13 = 917,838.78 : x
2. Step 2: Convert to fraction form
   1,562,391.42/2,156,117.13 = 917,838.78/x
3. Step 3: Cross multiply
   1,562,391.42x = 2,156,117.13 × 917,838.78
4. Step 4: Simplify right side
   1,562,391.42x = 1,978,967,916,136.30
5. Step 5: Solve for x
   x = 1,978,967,916,136.30/1,562,391.42
6. Step 6: Final answer
   x = 1,266,627.49