Finding the Fourth Proportional to 154,107.77, 212,641.61 and 86,103

Step by Step Solution

1. Step 1: Write the proportion equation
   154,107.77 : 212,641.61 = 86,103 : x
2. Step 2: Convert to fraction form
   154,107.77/212,641.61 = 86,103/x
3. Step 3: Cross multiply
   154,107.77x = 212,641.61 × 86,103
4. Step 4: Simplify right side
   154,107.77x = 18,309,080,115.32
5. Step 5: Solve for x
   x = 18,309,080,115.32/154,107.77
6. Step 6: Final answer
   x = 118,806.99