Finding the Fourth Proportional to 199,501.59, 299,362.55 and 81,256.17

Step by Step Solution

1. Step 1: Write the proportion equation
   199,501.59 : 299,362.55 = 81,256.17 : x
2. Step 2: Convert to fraction form
   199,501.59/299,362.55 = 81,256.17/x
3. Step 3: Cross multiply
   199,501.59x = 299,362.55 × 81,256.17
4. Step 4: Simplify right side
   199,501.59x = 24,325,053,848.15
5. Step 5: Solve for x
   x = 24,325,053,848.15/199,501.59
6. Step 6: Final answer
   x = 121,929.12