Finding the Fourth Proportional to 365,008.50, 547,152.90 and 128,185.10

Step by Step Solution

1. Step 1: Write the proportion equation
   365,008.50 : 547,152.90 = 128,185.10 : x
2. Step 2: Convert to fraction form
   365,008.50/547,152.90 = 128,185.10/x
3. Step 3: Cross multiply
   365,008.50x = 547,152.90 × 128,185.10
4. Step 4: Simplify right side
   365,008.50x = 70,136,846,466.03
5. Step 5: Solve for x
   x = 70,136,846,466.03/365,008.50
6. Step 6: Final answer
   x = 192,151.27