Finding the Fourth Proportional to 111,667.50, 154,101.16 and 61,366.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,667.50 : 154,101.16 = 61,366.50 : x
2. Step 2: Convert to fraction form
   111,667.50/154,101.16 = 61,366.50/x
3. Step 3: Cross multiply
   111,667.50x = 154,101.16 × 61,366.50
4. Step 4: Simplify right side
   111,667.50x = 9,456,648,835.14
5. Step 5: Solve for x
   x = 9,456,648,835.14/111,667.50
6. Step 6: Final answer
   x = 84,685.78