Finding the Fourth Proportional to 808,105.50, 1,212,164.33 and 358,705.56

Step by Step Solution

1. Step 1: Write the proportion equation
   808,105.50 : 1,212,164.33 = 358,705.56 : x
2. Step 2: Convert to fraction form
   808,105.50/1,212,164.33 = 358,705.56/x
3. Step 3: Cross multiply
   808,105.50x = 1,212,164.33 × 358,705.56
4. Step 4: Simplify right side
   808,105.50x = 434,810,083,011.15
5. Step 5: Solve for x
   x = 434,810,083,011.15/808,105.50
6. Step 6: Final answer
   x = 538,061.04