Finding the Fourth Proportional to 121,100.91, 167,101.46 and 72,692.57

Step by Step Solution

1. Step 1: Write the proportion equation
   121,100.91 : 167,101.46 = 72,692.57 : x
2. Step 2: Convert to fraction form
   121,100.91/167,101.46 = 72,692.57/x
3. Step 3: Cross multiply
   121,100.91x = 167,101.46 × 72,692.57
4. Step 4: Simplify right side
   121,100.91x = 12,147,035,313.94
5. Step 5: Solve for x
   x = 12,147,035,313.94/121,100.91
6. Step 6: Final answer
   x = 100,305.07