Finding the Third Proportional to 61,126 and 128,889.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61,126 : 128,889.50 = 128,889.50 : x
2. Step 2: Convert to fraction form
   61,126/128,889.50 = 128,889.50/x
3. Step 3: Cross multiply
   61,126x = 128,889.50 × 128,889.50
4. Step 4: Simplify right side
   61,126x = 16,612,503,210.25
5. Step 5: Solve for x
   x = 16,612,503,210.25/61,126
6. Step 6: Final answer
   x = 271,774.75