Finding the Third Proportional to 77,400.72 and 108,998.31

Step by Step Solution

1. Step 1: Write the proportion equation
   77,400.72 : 108,998.31 = 108,998.31 : x
2. Step 2: Convert to fraction form
   77,400.72/108,998.31 = 108,998.31/x
3. Step 3: Cross multiply
   77,400.72x = 108,998.31 × 108,998.31
4. Step 4: Simplify right side
   77,400.72x = 11,880,632,553.62
5. Step 5: Solve for x
   x = 11,880,632,553.62/77,400.72
6. Step 6: Final answer
   x = 153,495.12