Finding the Fourth Proportional to 111,069.63, 166,965.30 and 89,123.09

Step by Step Solution

1. Step 1: Write the proportion equation
   111,069.63 : 166,965.30 = 89,123.09 : x
2. Step 2: Convert to fraction form
   111,069.63/166,965.30 = 89,123.09/x
3. Step 3: Cross multiply
   111,069.63x = 166,965.30 × 89,123.09
4. Step 4: Simplify right side
   111,069.63x = 14,880,462,623.95
5. Step 5: Solve for x
   x = 14,880,462,623.95/111,069.63
6. Step 6: Final answer
   x = 133,974.18