Finding the Fourth Proportional to 50,719.40, 71,123.80 and 50,719.40

Step by Step Solution

1. Step 1: Write the proportion equation
   50,719.40 : 71,123.80 = 50,719.40 : x
2. Step 2: Convert to fraction form
   50,719.40/71,123.80 = 50,719.40/x
3. Step 3: Cross multiply
   50,719.40x = 71,123.80 × 50,719.40
4. Step 4: Simplify right side
   50,719.40x = 3,607,356,461.72
5. Step 5: Solve for x
   x = 3,607,356,461.72/50,719.40
6. Step 6: Final answer
   x = 71,123.80