Finding the Fourth Proportional to 123,360.21, 170,238.50 and 72,373.84

Step by Step Solution

1. Step 1: Write the proportion equation
   123,360.21 : 170,238.50 = 72,373.84 : x
2. Step 2: Convert to fraction form
   123,360.21/170,238.50 = 72,373.84/x
3. Step 3: Cross multiply
   123,360.21x = 170,238.50 × 72,373.84
4. Step 4: Simplify right side
   123,360.21x = 12,320,813,960.84
5. Step 5: Solve for x
   x = 12,320,813,960.84/123,360.21
6. Step 6: Final answer
   x = 99,876.73