Finding the Third Proportional to 64,666.50 and 99,768.75

Step by Step Solution

1. Step 1: Write the proportion equation
   64,666.50 : 99,768.75 = 99,768.75 : x
2. Step 2: Convert to fraction form
   64,666.50/99,768.75 = 99,768.75/x
3. Step 3: Cross multiply
   64,666.50x = 99,768.75 × 99,768.75
4. Step 4: Simplify right side
   64,666.50x = 9,953,803,476.56
5. Step 5: Solve for x
   x = 9,953,803,476.56/64,666.50
6. Step 6: Final answer
   x = 153,925.19