Finding the Fourth Proportional to 219,362.83, 328,996.71 and 128,117.25

Step by Step Solution

1. Step 1: Write the proportion equation
   219,362.83 : 328,996.71 = 128,117.25 : x
2. Step 2: Convert to fraction form
   219,362.83/328,996.71 = 128,117.25/x
3. Step 3: Cross multiply
   219,362.83x = 328,996.71 × 128,117.25
4. Step 4: Simplify right side
   219,362.83x = 42,150,153,744.25
5. Step 5: Solve for x
   x = 42,150,153,744.25/219,362.83
6. Step 6: Final answer
   x = 192,148.11