Finding the Fourth Proportional to 42,730.24, 64,018.56 and 26,081.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,730.24 : 64,018.56 = 26,081.60 : x
2. Step 2: Convert to fraction form
   42,730.24/64,018.56 = 26,081.60/x
3. Step 3: Cross multiply
   42,730.24x = 64,018.56 × 26,081.60
4. Step 4: Simplify right side
   42,730.24x = 1,669,706,474.50
5. Step 5: Solve for x
   x = 1,669,706,474.50/42,730.24
6. Step 6: Final answer
   x = 39,075.52