Finding the Third Proportional to 28,457.58 and 42,528.80

Step by Step Solution

1. Step 1: Write the proportion equation
   28,457.58 : 42,528.80 = 42,528.80 : x
2. Step 2: Convert to fraction form
   28,457.58/42,528.80 = 42,528.80/x
3. Step 3: Cross multiply
   28,457.58x = 42,528.80 × 42,528.80
4. Step 4: Simplify right side
   28,457.58x = 1,808,698,563.64
5. Step 5: Solve for x
   x = 1,808,698,563.64/28,457.58
6. Step 6: Final answer
   x = 63,557.71