Finding the Fourth Proportional to 111,036.56, 166,480.86 and 61,140.15

Step by Step Solution

1. Step 1: Write the proportion equation
   111,036.56 : 166,480.86 = 61,140.15 : x
2. Step 2: Convert to fraction form
   111,036.56/166,480.86 = 61,140.15/x
3. Step 3: Cross multiply
   111,036.56x = 166,480.86 × 61,140.15
4. Step 4: Simplify right side
   111,036.56x = 10,178,664,752.53
5. Step 5: Solve for x
   x = 10,178,664,752.53/111,036.56
6. Step 6: Final answer
   x = 91,669.49