Finding the Third Proportional to 42,813.80 and 65,230.55

Step by Step Solution

1. Step 1: Write the proportion equation
   42,813.80 : 65,230.55 = 65,230.55 : x
2. Step 2: Convert to fraction form
   42,813.80/65,230.55 = 65,230.55/x
3. Step 3: Cross multiply
   42,813.80x = 65,230.55 × 65,230.55
4. Step 4: Simplify right side
   42,813.80x = 4,255,024,627.82
5. Step 5: Solve for x
   x = 4,255,024,627.82/42,813.80
6. Step 6: Final answer
   x = 99,384.42