Finding the Fourth Proportional to 201,093.02, 277,405.72 and 128,419.52

Step by Step Solution

1. Step 1: Write the proportion equation
   201,093.02 : 277,405.72 = 128,419.52 : x
2. Step 2: Convert to fraction form
   201,093.02/277,405.72 = 128,419.52/x
3. Step 3: Cross multiply
   201,093.02x = 277,405.72 × 128,419.52
4. Step 4: Simplify right side
   201,093.02x = 35,624,309,780.12
5. Step 5: Solve for x
   x = 35,624,309,780.12/201,093.02
6. Step 6: Final answer
   x = 177,153.39