Finding the Third Proportional to 19,591.88 and 42,128.44

Step by Step Solution

1. Step 1: Write the proportion equation
   19,591.88 : 42,128.44 = 42,128.44 : x
2. Step 2: Convert to fraction form
   19,591.88/42,128.44 = 42,128.44/x
3. Step 3: Cross multiply
   19,591.88x = 42,128.44 × 42,128.44
4. Step 4: Simplify right side
   19,591.88x = 1,774,805,246.19
5. Step 5: Solve for x
   x = 1,774,805,246.19/19,591.88
6. Step 6: Final answer
   x = 90,588.84