Finding the Third Proportional to 61,458.75 and 84,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61,458.75 : 84,109.50 = 84,109.50 : x
2. Step 2: Convert to fraction form
   61,458.75/84,109.50 = 84,109.50/x
3. Step 3: Cross multiply
   61,458.75x = 84,109.50 × 84,109.50
4. Step 4: Simplify right side
   61,458.75x = 7,074,407,990.25
5. Step 5: Solve for x
   x = 7,074,407,990.25/61,458.75
6. Step 6: Final answer
   x = 115,108.23