Finding the Third Proportional to 72,912 and 109,152

Step by Step Solution

1. Step 1: Write the proportion equation
   72,912 : 109,152 = 109,152 : x
2. Step 2: Convert to fraction form
   72,912/109,152 = 109,152/x
3. Step 3: Cross multiply
   72,912x = 109,152 × 109,152
4. Step 4: Simplify right side
   72,912x = 11,914,159,104
5. Step 5: Solve for x
   x = 11,914,159,104/72,912
6. Step 6: Final answer
   x = 163,404.64