Finding the Third Proportional to 42,799.50 and 56,803.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,799.50 : 56,803.50 = 56,803.50 : x
2. Step 2: Convert to fraction form
   42,799.50/56,803.50 = 56,803.50/x
3. Step 3: Cross multiply
   42,799.50x = 56,803.50 × 56,803.50
4. Step 4: Simplify right side
   42,799.50x = 3,226,637,612.25
5. Step 5: Solve for x
   x = 3,226,637,612.25/42,799.50
6. Step 6: Final answer
   x = 75,389.61