Finding the Fourth Proportional to 86,899.50, 119,921.31 and 47,155.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,899.50 : 119,921.31 = 47,155.50 : x
2. Step 2: Convert to fraction form
   86,899.50/119,921.31 = 47,155.50/x
3. Step 3: Cross multiply
   86,899.50x = 119,921.31 × 47,155.50
4. Step 4: Simplify right side
   86,899.50x = 5,654,949,333.71
5. Step 5: Solve for x
   x = 5,654,949,333.71/86,899.50
6. Step 6: Final answer
   x = 65,074.59