Finding the Third Proportional to 78,806.81 and 117,931.78

Step by Step Solution

1. Step 1: Write the proportion equation
   78,806.81 : 117,931.78 = 117,931.78 : x
2. Step 2: Convert to fraction form
   78,806.81/117,931.78 = 117,931.78/x
3. Step 3: Cross multiply
   78,806.81x = 117,931.78 × 117,931.78
4. Step 4: Simplify right side
   78,806.81x = 13,907,905,028.80
5. Step 5: Solve for x
   x = 13,907,905,028.80/78,806.81
6. Step 6: Final answer
   x = 176,481.00