Finding the Third Proportional to 61,105.50 and 130,531.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61,105.50 : 130,531.50 = 130,531.50 : x
2. Step 2: Convert to fraction form
   61,105.50/130,531.50 = 130,531.50/x
3. Step 3: Cross multiply
   61,105.50x = 130,531.50 × 130,531.50
4. Step 4: Simplify right side
   61,105.50x = 17,038,472,492.25
5. Step 5: Solve for x
   x = 17,038,472,492.25/61,105.50
6. Step 6: Final answer
   x = 278,836.97