Finding the Third Proportional to 61,075.50 and 128,712

Step by Step Solution

1. Step 1: Write the proportion equation
   61,075.50 : 128,712 = 128,712 : x
2. Step 2: Convert to fraction form
   61,075.50/128,712 = 128,712/x
3. Step 3: Cross multiply
   61,075.50x = 128,712 × 128,712
4. Step 4: Simplify right side
   61,075.50x = 16,566,778,944
5. Step 5: Solve for x
   x = 16,566,778,944/61,075.50
6. Step 6: Final answer
   x = 271,250.81