Finding the Fourth Proportional to 201,096.52, 277,410.55 and 128,423.02

Step by Step Solution

1. Step 1: Write the proportion equation
   201,096.52 : 277,410.55 = 128,423.02 : x
2. Step 2: Convert to fraction form
   201,096.52/277,410.55 = 128,423.02/x
3. Step 3: Cross multiply
   201,096.52x = 277,410.55 × 128,423.02
4. Step 4: Simplify right side
   201,096.52x = 35,625,900,610.86
5. Step 5: Solve for x
   x = 35,625,900,610.86/201,096.52
6. Step 6: Final answer
   x = 177,158.22