Finding the Third Proportional to 139,633.88 and 215,770.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,633.88 : 215,770.50 = 215,770.50 : x
2. Step 2: Convert to fraction form
   139,633.88/215,770.50 = 215,770.50/x
3. Step 3: Cross multiply
   139,633.88x = 215,770.50 × 215,770.50
4. Step 4: Simplify right side
   139,633.88x = 46,556,908,670.25
5. Step 5: Solve for x
   x = 46,556,908,670.25/139,633.88
6. Step 6: Final answer
   x = 333,421.30