Finding the Fourth Proportional to 186,111.27, 278,917.83 and 91,196.28

Step by Step Solution

1. Step 1: Write the proportion equation
   186,111.27 : 278,917.83 = 91,196.28 : x
2. Step 2: Convert to fraction form
   186,111.27/278,917.83 = 91,196.28/x
3. Step 3: Cross multiply
   186,111.27x = 278,917.83 × 91,196.28
4. Step 4: Simplify right side
   186,111.27x = 25,436,268,521.67
5. Step 5: Solve for x
   x = 25,436,268,521.67/186,111.27
6. Step 6: Final answer
   x = 136,672.37