Finding the Fourth Proportional to 111,034.81, 166,478.23 and 61,138.40

Step by Step Solution

1. Step 1: Write the proportion equation
   111,034.81 : 166,478.23 = 61,138.40 : x
2. Step 2: Convert to fraction form
   111,034.81/166,478.23 = 61,138.40/x
3. Step 3: Cross multiply
   111,034.81x = 166,478.23 × 61,138.40
4. Step 4: Simplify right side
   111,034.81x = 10,178,212,880.38
5. Step 5: Solve for x
   x = 10,178,212,880.38/111,034.81
6. Step 6: Final answer
   x = 91,666.87