Finding the Third Proportional to 56,781 and 86,548.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,781 : 86,548.50 = 86,548.50 : x
2. Step 2: Convert to fraction form
   56,781/86,548.50 = 86,548.50/x
3. Step 3: Cross multiply
   56,781x = 86,548.50 × 86,548.50
4. Step 4: Simplify right side
   56,781x = 7,490,642,852.25
5. Step 5: Solve for x
   x = 7,490,642,852.25/56,781
6. Step 6: Final answer
   x = 131,921.64