Finding the Fourth Proportional to 138,111.18, 207,166.83 and 55,063.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,111.18 : 207,166.83 = 55,063.50 : x
2. Step 2: Convert to fraction form
   138,111.18/207,166.83 = 55,063.50/x
3. Step 3: Cross multiply
   138,111.18x = 207,166.83 × 55,063.50
4. Step 4: Simplify right side
   138,111.18x = 11,407,330,743.71
5. Step 5: Solve for x
   x = 11,407,330,743.71/138,111.18
6. Step 6: Final answer
   x = 82,595.27