Finding the Third Proportional to 18,977.25 and 28,312.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,977.25 : 28,312.50 = 28,312.50 : x
2. Step 2: Convert to fraction form
   18,977.25/28,312.50 = 28,312.50/x
3. Step 3: Cross multiply
   18,977.25x = 28,312.50 × 28,312.50
4. Step 4: Simplify right side
   18,977.25x = 801,597,656.25
5. Step 5: Solve for x
   x = 801,597,656.25/18,977.25
6. Step 6: Final answer
   x = 42,239.93