Finding the Third Proportional to 71,490 and 141,185.50

Step by Step Solution

1. Step 1: Write the proportion equation
   71,490 : 141,185.50 = 141,185.50 : x
2. Step 2: Convert to fraction form
   71,490/141,185.50 = 141,185.50/x
3. Step 3: Cross multiply
   71,490x = 141,185.50 × 141,185.50
4. Step 4: Simplify right side
   71,490x = 19,933,345,410.25
5. Step 5: Solve for x
   x = 19,933,345,410.25/71,490
6. Step 6: Final answer
   x = 278,827.04