Finding the Third Proportional to 59,280.19 and 90,397.69

Step by Step Solution

1. Step 1: Write the proportion equation
   59,280.19 : 90,397.69 = 90,397.69 : x
2. Step 2: Convert to fraction form
   59,280.19/90,397.69 = 90,397.69/x
3. Step 3: Cross multiply
   59,280.19x = 90,397.69 × 90,397.69
4. Step 4: Simplify right side
   59,280.19x = 8,171,741,905.35
5. Step 5: Solve for x
   x = 8,171,741,905.35/59,280.19
6. Step 6: Final answer
   x = 137,849.46