Finding the Fourth Proportional to 111,870.57, 154,388.27 and 64,131.09

Step by Step Solution

1. Step 1: Write the proportion equation
   111,870.57 : 154,388.27 = 64,131.09 : x
2. Step 2: Convert to fraction form
   111,870.57/154,388.27 = 64,131.09/x
3. Step 3: Cross multiply
   111,870.57x = 154,388.27 × 64,131.09
4. Step 4: Simplify right side
   111,870.57x = 9,901,088,038.31
5. Step 5: Solve for x
   x = 9,901,088,038.31/111,870.57
6. Step 6: Final answer
   x = 88,504.85