Finding the Fourth Proportional to 149,096.66, 205,748.69 and 81,111.89

Step by Step Solution

1. Step 1: Write the proportion equation
   149,096.66 : 205,748.69 = 81,111.89 : x
2. Step 2: Convert to fraction form
   149,096.66/205,748.69 = 81,111.89/x
3. Step 3: Cross multiply
   149,096.66x = 205,748.69 × 81,111.89
4. Step 4: Simplify right side
   149,096.66x = 16,688,665,110.92
5. Step 5: Solve for x
   x = 16,688,665,110.92/149,096.66
6. Step 6: Final answer
   x = 111,931.85