Finding the Third Proportional to 218,139 and 314,182.50

Step by Step Solution

1. Step 1: Write the proportion equation
   218,139 : 314,182.50 = 314,182.50 : x
2. Step 2: Convert to fraction form
   218,139/314,182.50 = 314,182.50/x
3. Step 3: Cross multiply
   218,139x = 314,182.50 × 314,182.50
4. Step 4: Simplify right side
   218,139x = 98,710,643,306.25
5. Step 5: Solve for x
   x = 98,710,643,306.25/218,139
6. Step 6: Final answer
   x = 452,512.59