Finding the Fourth Proportional to 108,729, 150,046.29 and 63,438.12

Step by Step Solution

1. Step 1: Write the proportion equation
   108,729 : 150,046.29 = 63,438.12 : x
2. Step 2: Convert to fraction form
   108,729/150,046.29 = 63,438.12/x
3. Step 3: Cross multiply
   108,729x = 150,046.29 × 63,438.12
4. Step 4: Simplify right side
   108,729x = 9,518,654,550.57
5. Step 5: Solve for x
   x = 9,518,654,550.57/108,729
6. Step 6: Final answer
   x = 87,544.76