Finding the Third Proportional to 42,758 and 64,897

Step by Step Solution

1. Step 1: Write the proportion equation
   42,758 : 64,897 = 64,897 : x
2. Step 2: Convert to fraction form
   42,758/64,897 = 64,897/x
3. Step 3: Cross multiply
   42,758x = 64,897 × 64,897
4. Step 4: Simplify right side
   42,758x = 4,211,620,609
5. Step 5: Solve for x
   x = 4,211,620,609/42,758
6. Step 6: Final answer
   x = 98,499.01