Finding the Fourth Proportional to 144,877.20, 199,972.17 and 87,507.39

Step by Step Solution

1. Step 1: Write the proportion equation
   144,877.20 : 199,972.17 = 87,507.39 : x
2. Step 2: Convert to fraction form
   144,877.20/199,972.17 = 87,507.39/x
3. Step 3: Cross multiply
   144,877.20x = 199,972.17 × 87,507.39
4. Step 4: Simplify right side
   144,877.20x = 17,499,042,669.34
5. Step 5: Solve for x
   x = 17,499,042,669.34/144,877.20
6. Step 6: Final answer
   x = 120,785.35