Finding the Third Proportional to 144,402 and 316,702.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,402 : 316,702.50 = 316,702.50 : x
2. Step 2: Convert to fraction form
   144,402/316,702.50 = 316,702.50/x
3. Step 3: Cross multiply
   144,402x = 316,702.50 × 316,702.50
4. Step 4: Simplify right side
   144,402x = 100,300,473,506.25
5. Step 5: Solve for x
   x = 100,300,473,506.25/144,402
6. Step 6: Final answer
   x = 694,592.00