Finding the Third Proportional to 56,388 and 79,318.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,388 : 79,318.50 = 79,318.50 : x
2. Step 2: Convert to fraction form
   56,388/79,318.50 = 79,318.50/x
3. Step 3: Cross multiply
   56,388x = 79,318.50 × 79,318.50
4. Step 4: Simplify right side
   56,388x = 6,291,424,442.25
5. Step 5: Solve for x
   x = 6,291,424,442.25/56,388
6. Step 6: Final answer
   x = 111,573.82