Finding the Fourth Proportional to 138,866.59, 208,300.18 and 50,182.72

Step by Step Solution

1. Step 1: Write the proportion equation
   138,866.59 : 208,300.18 = 50,182.72 : x
2. Step 2: Convert to fraction form
   138,866.59/208,300.18 = 50,182.72/x
3. Step 3: Cross multiply
   138,866.59x = 208,300.18 × 50,182.72
4. Step 4: Simplify right side
   138,866.59x = 10,453,070,255.10
5. Step 5: Solve for x
   x = 10,453,070,255.10/138,866.59
6. Step 6: Final answer
   x = 75,274.19