Finding the Fourth Proportional to 430,533,863.27, 645,903,663.18 and 139,401,306.27

Step by Step Solution

1. Step 1: Write the proportion equation
   430,533,863.27 : 645,903,663.18 = 139,401,306.27 : x
2. Step 2: Convert to fraction form
   430,533,863.27/645,903,663.18 = 139,401,306.27/x
3. Step 3: Cross multiply
   430,533,863.27x = 645,903,663.18 × 139,401,306.27
4. Step 4: Simplify right side
   430,533,863.27x = 90,039,814,371,870,096
5. Step 5: Solve for x
   x = 90,039,814,371,870,096/430,533,863.27
6. Step 6: Final answer
   x = 209,135,266.82