Finding the Fourth Proportional to 154,401.33, 213,025.27 and 86,407.50

Step by Step Solution

1. Step 1: Write the proportion equation
   154,401.33 : 213,025.27 = 86,407.50 : x
2. Step 2: Convert to fraction form
   154,401.33/213,025.27 = 86,407.50/x
3. Step 3: Cross multiply
   154,401.33x = 213,025.27 × 86,407.50
4. Step 4: Simplify right side
   154,401.33x = 18,406,980,905.77
5. Step 5: Solve for x
   x = 18,406,980,905.77/154,401.33
6. Step 6: Final answer
   x = 119,215.17