Finding the Third Proportional to 31,779.84 and 42,190.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,779.84 : 42,190.88 = 42,190.88 : x
2. Step 2: Convert to fraction form
   31,779.84/42,190.88 = 42,190.88/x
3. Step 3: Cross multiply
   31,779.84x = 42,190.88 × 42,190.88
4. Step 4: Simplify right side
   31,779.84x = 1,780,069,933.27
5. Step 5: Solve for x
   x = 1,780,069,933.27/31,779.84
6. Step 6: Final answer
   x = 56,012.55