Finding the Fourth Proportional to 1,058,861.10, 1,587,708.45 and 427,061.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,058,861.10 : 1,587,708.45 = 427,061.10 : x
2. Step 2: Convert to fraction form
   1,058,861.10/1,587,708.45 = 427,061.10/x
3. Step 3: Cross multiply
   1,058,861.10x = 1,587,708.45 × 427,061.10
4. Step 4: Simplify right side
   1,058,861.10x = 678,048,517,136.30
5. Step 5: Solve for x
   x = 678,048,517,136.30/1,058,861.10
6. Step 6: Final answer
   x = 640,356.43