Finding the Third Proportional to 129,430.50 and 265,131

Step by Step Solution

1. Step 1: Write the proportion equation
   129,430.50 : 265,131 = 265,131 : x
2. Step 2: Convert to fraction form
   129,430.50/265,131 = 265,131/x
3. Step 3: Cross multiply
   129,430.50x = 265,131 × 265,131
4. Step 4: Simplify right side
   129,430.50x = 70,294,447,161
5. Step 5: Solve for x
   x = 70,294,447,161/129,430.50
6. Step 6: Final answer
   x = 543,105.74