Finding the Third Proportional to 58,218.75 and 81,961.88

Step by Step Solution

1. Step 1: Write the proportion equation
   58,218.75 : 81,961.88 = 81,961.88 : x
2. Step 2: Convert to fraction form
   58,218.75/81,961.88 = 81,961.88/x
3. Step 3: Cross multiply
   58,218.75x = 81,961.88 × 81,961.88
4. Step 4: Simplify right side
   58,218.75x = 6,717,748,953.52
5. Step 5: Solve for x
   x = 6,717,748,953.52/58,218.75
6. Step 6: Final answer
   x = 115,388.07