Finding the Fourth Proportional to 191,308.18, 286,568.48 and 112,231.72

Step by Step Solution

1. Step 1: Write the proportion equation
   191,308.18 : 286,568.48 = 112,231.72 : x
2. Step 2: Convert to fraction form
   191,308.18/286,568.48 = 112,231.72/x
3. Step 3: Cross multiply
   191,308.18x = 286,568.48 × 112,231.72
4. Step 4: Simplify right side
   191,308.18x = 32,162,073,408.19
5. Step 5: Solve for x
   x = 32,162,073,408.19/191,308.18
6. Step 6: Final answer
   x = 168,116.56