Finding the Third Proportional to 56,939 and 81,111.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,939 : 81,111.50 = 81,111.50 : x
2. Step 2: Convert to fraction form
   56,939/81,111.50 = 81,111.50/x
3. Step 3: Cross multiply
   56,939x = 81,111.50 × 81,111.50
4. Step 4: Simplify right side
   56,939x = 6,579,075,432.25
5. Step 5: Solve for x
   x = 6,579,075,432.25/56,939
6. Step 6: Final answer
   x = 115,546.03