Finding the Fourth Proportional to 123,859.99, 170,897.50 and 72,874.94

Step by Step Solution

1. Step 1: Write the proportion equation
   123,859.99 : 170,897.50 = 72,874.94 : x
2. Step 2: Convert to fraction form
   123,859.99/170,897.50 = 72,874.94/x
3. Step 3: Cross multiply
   123,859.99x = 170,897.50 × 72,874.94
4. Step 4: Simplify right side
   123,859.99x = 12,454,144,846.63
5. Step 5: Solve for x
   x = 12,454,144,846.63/123,859.99
6. Step 6: Final answer
   x = 100,550.19