Finding the Third Proportional to 142,913 and 210,093

Step by Step Solution

1. Step 1: Write the proportion equation
   142,913 : 210,093 = 210,093 : x
2. Step 2: Convert to fraction form
   142,913/210,093 = 210,093/x
3. Step 3: Cross multiply
   142,913x = 210,093 × 210,093
4. Step 4: Simplify right side
   142,913x = 44,139,068,649
5. Step 5: Solve for x
   x = 44,139,068,649/142,913
6. Step 6: Final answer
   x = 308,852.72