Finding the Third Proportional to 13,128.19 and 28,807.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,128.19 : 28,807.31 = 28,807.31 : x
2. Step 2: Convert to fraction form
   13,128.19/28,807.31 = 28,807.31/x
3. Step 3: Cross multiply
   13,128.19x = 28,807.31 × 28,807.31
4. Step 4: Simplify right side
   13,128.19x = 829,861,253.47
5. Step 5: Solve for x
   x = 829,861,253.47/13,128.19
6. Step 6: Final answer
   x = 63,212.17