Finding the Third Proportional to 78,801.75 and 175,099.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,801.75 : 175,099.50 = 175,099.50 : x
2. Step 2: Convert to fraction form
   78,801.75/175,099.50 = 175,099.50/x
3. Step 3: Cross multiply
   78,801.75x = 175,099.50 × 175,099.50
4. Step 4: Simplify right side
   78,801.75x = 30,659,834,900.25
5. Step 5: Solve for x
   x = 30,659,834,900.25/78,801.75
6. Step 6: Final answer
   x = 389,075.56