Finding the Fourth Proportional to 154,036.50, 212,570.37 and 83,380.50

Step by Step Solution

1. Step 1: Write the proportion equation
   154,036.50 : 212,570.37 = 83,380.50 : x
2. Step 2: Convert to fraction form
   154,036.50/212,570.37 = 83,380.50/x
3. Step 3: Cross multiply
   154,036.50x = 212,570.37 × 83,380.50
4. Step 4: Simplify right side
   154,036.50x = 17,724,223,735.79
5. Step 5: Solve for x
   x = 17,724,223,735.79/154,036.50
6. Step 6: Final answer
   x = 115,065.09