Finding the Third Proportional to 11,485.13 and 28,513.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,485.13 : 28,513.69 = 28,513.69 : x
2. Step 2: Convert to fraction form
   11,485.13/28,513.69 = 28,513.69/x
3. Step 3: Cross multiply
   11,485.13x = 28,513.69 × 28,513.69
4. Step 4: Simplify right side
   11,485.13x = 813,030,374.85
5. Step 5: Solve for x
   x = 813,030,374.85/11,485.13
6. Step 6: Final answer
   x = 70,789.86