Finding the Fourth Proportional to 402,142.15, 603,212.83 and 102,622.73

Step by Step Solution

1. Step 1: Write the proportion equation
   402,142.15 : 603,212.83 = 102,622.73 : x
2. Step 2: Convert to fraction form
   402,142.15/603,212.83 = 102,622.73/x
3. Step 3: Cross multiply
   402,142.15x = 603,212.83 × 102,622.73
4. Step 4: Simplify right side
   402,142.15x = 61,903,346,759.89
5. Step 5: Solve for x
   x = 61,903,346,759.89/402,142.15
6. Step 6: Final answer
   x = 153,933.99