Finding the Fourth Proportional to 128,929.59, 193,472.15 and 55,057.59

Step by Step Solution

1. Step 1: Write the proportion equation
   128,929.59 : 193,472.15 = 55,057.59 : x
2. Step 2: Convert to fraction form
   128,929.59/193,472.15 = 55,057.59/x
3. Step 3: Cross multiply
   128,929.59x = 193,472.15 × 55,057.59
4. Step 4: Simplify right side
   128,929.59x = 10,652,110,035.83
5. Step 5: Solve for x
   x = 10,652,110,035.83/128,929.59
6. Step 6: Final answer
   x = 82,619.59