Finding the Fourth Proportional to 120,326.69, 165,998.69 and 72,553.50

Step by Step Solution

1. Step 1: Write the proportion equation
   120,326.69 : 165,998.69 = 72,553.50 : x
2. Step 2: Convert to fraction form
   120,326.69/165,998.69 = 72,553.50/x
3. Step 3: Cross multiply
   120,326.69x = 165,998.69 × 72,553.50
4. Step 4: Simplify right side
   120,326.69x = 12,043,785,521.02
5. Step 5: Solve for x
   x = 12,043,785,521.02/120,326.69
6. Step 6: Final answer
   x = 100,092.39