Finding the Third Proportional to 19,485.56 and 42,089.63

Step by Step Solution

1. Step 1: Write the proportion equation
   19,485.56 : 42,089.63 = 42,089.63 : x
2. Step 2: Convert to fraction form
   19,485.56/42,089.63 = 42,089.63/x
3. Step 3: Cross multiply
   19,485.56x = 42,089.63 × 42,089.63
4. Step 4: Simplify right side
   19,485.56x = 1,771,536,532.64
5. Step 5: Solve for x
   x = 1,771,536,532.64/19,485.56
6. Step 6: Final answer
   x = 90,915.34