Finding the Third Proportional to 59,990.63 and 90,441.56

Step by Step Solution

1. Step 1: Write the proportion equation
   59,990.63 : 90,441.56 = 90,441.56 : x
2. Step 2: Convert to fraction form
   59,990.63/90,441.56 = 90,441.56/x
3. Step 3: Cross multiply
   59,990.63x = 90,441.56 × 90,441.56
4. Step 4: Simplify right side
   59,990.63x = 8,179,676,227.44
5. Step 5: Solve for x
   x = 8,179,676,227.44/59,990.63
6. Step 6: Final answer
   x = 136,349.24