Finding the Fourth Proportional to 1,123,743.12, 1,685,616.12 and 458,895.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,743.12 : 1,685,616.12 = 458,895.12 : x
2. Step 2: Convert to fraction form
   1,123,743.12/1,685,616.12 = 458,895.12/x
3. Step 3: Cross multiply
   1,123,743.12x = 1,685,616.12 × 458,895.12
4. Step 4: Simplify right side
   1,123,743.12x = 773,521,011,661.34
5. Step 5: Solve for x
   x = 773,521,011,661.34/1,123,743.12
6. Step 6: Final answer
   x = 688,343.27