Finding the Third Proportional to 285,538.50 and 614,139

Step by Step Solution

1. Step 1: Write the proportion equation
   285,538.50 : 614,139 = 614,139 : x
2. Step 2: Convert to fraction form
   285,538.50/614,139 = 614,139/x
3. Step 3: Cross multiply
   285,538.50x = 614,139 × 614,139
4. Step 4: Simplify right side
   285,538.50x = 377,166,711,321
5. Step 5: Solve for x
   x = 377,166,711,321/285,538.50
6. Step 6: Final answer
   x = 1,320,896.17