Finding the Third Proportional to 42,678.50 and 61,475.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,678.50 : 61,475.50 = 61,475.50 : x
2. Step 2: Convert to fraction form
   42,678.50/61,475.50 = 61,475.50/x
3. Step 3: Cross multiply
   42,678.50x = 61,475.50 × 61,475.50
4. Step 4: Simplify right side
   42,678.50x = 3,779,237,100.25
5. Step 5: Solve for x
   x = 3,779,237,100.25/42,678.50
6. Step 6: Final answer
   x = 88,551.31