Finding the Fourth Proportional to 430,065.31, 645,106.83 and 156,502.15

Step by Step Solution

1. Step 1: Write the proportion equation
   430,065.31 : 645,106.83 = 156,502.15 : x
2. Step 2: Convert to fraction form
   430,065.31/645,106.83 = 156,502.15/x
3. Step 3: Cross multiply
   430,065.31x = 645,106.83 × 156,502.15
4. Step 4: Simplify right side
   430,065.31x = 100,960,605,874.69
5. Step 5: Solve for x
   x = 100,960,605,874.69/430,065.31
6. Step 6: Final answer
   x = 234,756.45