Finding the Fourth Proportional to 150,005.20, 207,019.72 and 86,363.60

Step by Step Solution

1. Step 1: Write the proportion equation
   150,005.20 : 207,019.72 = 86,363.60 : x
2. Step 2: Convert to fraction form
   150,005.20/207,019.72 = 86,363.60/x
3. Step 3: Cross multiply
   150,005.20x = 207,019.72 × 86,363.60
4. Step 4: Simplify right side
   150,005.20x = 17,878,968,290.19
5. Step 5: Solve for x
   x = 17,878,968,290.19/150,005.20
6. Step 6: Final answer
   x = 119,188.99