Finding the Third Proportional to 9,345.63 and 19,987.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,345.63 : 19,987.25 = 19,987.25 : x
2. Step 2: Convert to fraction form
   9,345.63/19,987.25 = 19,987.25/x
3. Step 3: Cross multiply
   9,345.63x = 19,987.25 × 19,987.25
4. Step 4: Simplify right side
   9,345.63x = 399,490,162.56
5. Step 5: Solve for x
   x = 399,490,162.56/9,345.63
6. Step 6: Final answer
   x = 42,746.22