Finding the Third Proportional to 89,217,499.50 and 136,390,536

Step by Step Solution

1. Step 1: Write the proportion equation
   89,217,499.50 : 136,390,536 = 136,390,536 : x
2. Step 2: Convert to fraction form
   89,217,499.50/136,390,536 = 136,390,536/x
3. Step 3: Cross multiply
   89,217,499.50x = 136,390,536 × 136,390,536
4. Step 4: Simplify right side
   89,217,499.50x = 18,602,378,310,367,296
5. Step 5: Solve for x
   x = 18,602,378,310,367,296/89,217,499.50
6. Step 6: Final answer
   x = 208,505,936.78