Finding the Fourth Proportional to 89,856.02, 123,102.58 and 86,491.28

Step by Step Solution

1. Step 1: Write the proportion equation
   89,856.02 : 123,102.58 = 86,491.28 : x
2. Step 2: Convert to fraction form
   89,856.02/123,102.58 = 86,491.28/x
3. Step 3: Cross multiply
   89,856.02x = 123,102.58 × 86,491.28
4. Step 4: Simplify right side
   89,856.02x = 10,647,299,715.50
5. Step 5: Solve for x
   x = 10,647,299,715.50/89,856.02
6. Step 6: Final answer
   x = 118,492.89