Finding the Fourth Proportional to 121,380.76, 167,510.58 and 67,665.72

Step by Step Solution

1. Step 1: Write the proportion equation
   121,380.76 : 167,510.58 = 67,665.72 : x
2. Step 2: Convert to fraction form
   121,380.76/167,510.58 = 67,665.72/x
3. Step 3: Cross multiply
   121,380.76x = 167,510.58 × 67,665.72
4. Step 4: Simplify right side
   121,380.76x = 11,334,724,003.32
5. Step 5: Solve for x
   x = 11,334,724,003.32/121,380.76
6. Step 6: Final answer
   x = 93,381.55