Finding the Fourth Proportional to 1,061,626.42, 1,592,429.91 and 430,390.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061,626.42 : 1,592,429.91 = 430,390.18 : x
2. Step 2: Convert to fraction form
   1,061,626.42/1,592,429.91 = 430,390.18/x
3. Step 3: Cross multiply
   1,061,626.42x = 1,592,429.91 × 430,390.18
4. Step 4: Simplify right side
   1,061,626.42x = 685,366,195,602.28
5. Step 5: Solve for x
   x = 685,366,195,602.28/1,061,626.42
6. Step 6: Final answer
   x = 645,581.33