Finding the Third Proportional to 780.47 and 1,155.94

Step by Step Solution

1. Step 1: Write the proportion equation
   780.47 : 1,155.94 = 1,155.94 : x
2. Step 2: Convert to fraction form
   780.47/1,155.94 = 1,155.94/x
3. Step 3: Cross multiply
   780.47x = 1,155.94 × 1,155.94
4. Step 4: Simplify right side
   780.47x = 1,336,191.50
5. Step 5: Solve for x
   x = 1,336,191.50/780.47
6. Step 6: Final answer
   x = 1,712.04