Finding the Third Proportional to 138,393 and 211,567.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,393 : 211,567.50 = 211,567.50 : x
2. Step 2: Convert to fraction form
   138,393/211,567.50 = 211,567.50/x
3. Step 3: Cross multiply
   138,393x = 211,567.50 × 211,567.50
4. Step 4: Simplify right side
   138,393x = 44,760,807,056.25
5. Step 5: Solve for x
   x = 44,760,807,056.25/138,393
6. Step 6: Final answer
   x = 323,432.59