Finding the Fourth Proportional to 138,105.71, 207,167.32 and 43,339.63

Step by Step Solution

1. Step 1: Write the proportion equation
   138,105.71 : 207,167.32 = 43,339.63 : x
2. Step 2: Convert to fraction form
   138,105.71/207,167.32 = 43,339.63/x
3. Step 3: Cross multiply
   138,105.71x = 207,167.32 × 43,339.63
4. Step 4: Simplify right side
   138,105.71x = 8,978,555,641.37
5. Step 5: Solve for x
   x = 8,978,555,641.37/138,105.71
6. Step 6: Final answer
   x = 65,012.20