Finding the Third Proportional to 53,428.50 and 83,059.50

Step by Step Solution

1. Step 1: Write the proportion equation
   53,428.50 : 83,059.50 = 83,059.50 : x
2. Step 2: Convert to fraction form
   53,428.50/83,059.50 = 83,059.50/x
3. Step 3: Cross multiply
   53,428.50x = 83,059.50 × 83,059.50
4. Step 4: Simplify right side
   53,428.50x = 6,898,880,540.25
5. Step 5: Solve for x
   x = 6,898,880,540.25/53,428.50
6. Step 6: Final answer
   x = 129,123.61