Finding the Fourth Proportional to 151,528.08, 209,066.76 and 86,997

Step by Step Solution

1. Step 1: Write the proportion equation
   151,528.08 : 209,066.76 = 86,997 : x
2. Step 2: Convert to fraction form
   151,528.08/209,066.76 = 86,997/x
3. Step 3: Cross multiply
   151,528.08x = 209,066.76 × 86,997
4. Step 4: Simplify right side
   151,528.08x = 18,188,180,919.72
5. Step 5: Solve for x
   x = 18,188,180,919.72/151,528.08
6. Step 6: Final answer
   x = 120,031.75