Finding the Third Proportional to 19,889.72 and 42,892.88

Step by Step Solution

1. Step 1: Write the proportion equation
   19,889.72 : 42,892.88 = 42,892.88 : x
2. Step 2: Convert to fraction form
   19,889.72/42,892.88 = 42,892.88/x
3. Step 3: Cross multiply
   19,889.72x = 42,892.88 × 42,892.88
4. Step 4: Simplify right side
   19,889.72x = 1,839,798,725.77
5. Step 5: Solve for x
   x = 1,839,798,725.77/19,889.72
6. Step 6: Final answer
   x = 92,499.99