Finding the Fourth Proportional to 140,185.08, 193,451.69 and 128,900.16

Step by Step Solution

1. Step 1: Write the proportion equation
   140,185.08 : 193,451.69 = 128,900.16 : x
2. Step 2: Convert to fraction form
   140,185.08/193,451.69 = 128,900.16/x
3. Step 3: Cross multiply
   140,185.08x = 193,451.69 × 128,900.16
4. Step 4: Simplify right side
   140,185.08x = 24,935,954,115.52
5. Step 5: Solve for x
   x = 24,935,954,115.52/140,185.08
6. Step 6: Final answer
   x = 177,878.80