Finding the Fourth Proportional to 42,820.56, 64,161.72 and 26,370

Step by Step Solution

1. Step 1: Write the proportion equation
   42,820.56 : 64,161.72 = 26,370 : x
2. Step 2: Convert to fraction form
   42,820.56/64,161.72 = 26,370/x
3. Step 3: Cross multiply
   42,820.56x = 64,161.72 × 26,370
4. Step 4: Simplify right side
   42,820.56x = 1,691,944,556.40
5. Step 5: Solve for x
   x = 1,691,944,556.40/42,820.56
6. Step 6: Final answer
   x = 39,512.43