Finding the Fourth Proportional to 186,196.92, 279,076.60 and 86,145.72

Step by Step Solution

1. Step 1: Write the proportion equation
   186,196.92 : 279,076.60 = 86,145.72 : x
2. Step 2: Convert to fraction form
   186,196.92/279,076.60 = 86,145.72/x
3. Step 3: Cross multiply
   186,196.92x = 279,076.60 × 86,145.72
4. Step 4: Simplify right side
   186,196.92x = 24,041,254,642.15
5. Step 5: Solve for x
   x = 24,041,254,642.15/186,196.92
6. Step 6: Final answer
   x = 129,117.36