Finding the Third Proportional to 39,430.31 and 85,515.59

Step by Step Solution

1. Step 1: Write the proportion equation
   39,430.31 : 85,515.59 = 85,515.59 : x
2. Step 2: Convert to fraction form
   39,430.31/85,515.59 = 85,515.59/x
3. Step 3: Cross multiply
   39,430.31x = 85,515.59 × 85,515.59
4. Step 4: Simplify right side
   39,430.31x = 7,312,916,440.37
5. Step 5: Solve for x
   x = 7,312,916,440.37/39,430.31
6. Step 6: Final answer
   x = 185,464.34