Finding the Fourth Proportional to 1,072,300.28, 1,479,404.28 and 685,342.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072,300.28 : 1,479,404.28 = 685,342.11 : x
2. Step 2: Convert to fraction form
   1,072,300.28/1,479,404.28 = 685,342.11/x
3. Step 3: Cross multiply
   1,072,300.28x = 1,479,404.28 × 685,342.11
4. Step 4: Simplify right side
   1,072,300.28x = 1,013,898,058,916.03
5. Step 5: Solve for x
   x = 1,013,898,058,916.03/1,072,300.28
6. Step 6: Final answer
   x = 945,535.58