Finding the Third Proportional to 91,443,069 and 139,308,381

Step by Step Solution

1. Step 1: Write the proportion equation
   91,443,069 : 139,308,381 = 139,308,381 : x
2. Step 2: Convert to fraction form
   91,443,069/139,308,381 = 139,308,381/x
3. Step 3: Cross multiply
   91,443,069x = 139,308,381 × 139,308,381
4. Step 4: Simplify right side
   91,443,069x = 19,406,825,016,841,160
5. Step 5: Solve for x
   x = 19,406,825,016,841,160/91,443,069
6. Step 6: Final answer
   x = 212,228,496.15