Finding the Fourth Proportional to 154,870.56, 213,642.66 and 101,187

Step by Step Solution

1. Step 1: Write the proportion equation
   154,870.56 : 213,642.66 = 101,187 : x
2. Step 2: Convert to fraction form
   154,870.56/213,642.66 = 101,187/x
3. Step 3: Cross multiply
   154,870.56x = 213,642.66 × 101,187
4. Step 4: Simplify right side
   154,870.56x = 21,617,859,837.42
5. Step 5: Solve for x
   x = 21,617,859,837.42/154,870.56
6. Step 6: Final answer
   x = 139,586.63