Finding the Third Proportional to 55,490.50 and 78,518

Step by Step Solution

1. Step 1: Write the proportion equation
   55,490.50 : 78,518 = 78,518 : x
2. Step 2: Convert to fraction form
   55,490.50/78,518 = 78,518/x
3. Step 3: Cross multiply
   55,490.50x = 78,518 × 78,518
4. Step 4: Simplify right side
   55,490.50x = 6,165,076,324
5. Step 5: Solve for x
   x = 6,165,076,324/55,490.50
6. Step 6: Final answer
   x = 111,101.47