Finding the Fourth Proportional to 138,643.74, 191,281.82 and 113,105.96

Step by Step Solution

1. Step 1: Write the proportion equation
   138,643.74 : 191,281.82 = 113,105.96 : x
2. Step 2: Convert to fraction form
   138,643.74/191,281.82 = 113,105.96/x
3. Step 3: Cross multiply
   138,643.74x = 191,281.82 × 113,105.96
4. Step 4: Simplify right side
   138,643.74x = 21,635,112,359.71
5. Step 5: Solve for x
   x = 21,635,112,359.71/138,643.74
6. Step 6: Final answer
   x = 156,048.25