Finding the Fourth Proportional to 64,978.35, 89,671.62 and 38,140.22

Step by Step Solution

1. Step 1: Write the proportion equation
   64,978.35 : 89,671.62 = 38,140.22 : x
2. Step 2: Convert to fraction form
   64,978.35/89,671.62 = 38,140.22/x
3. Step 3: Cross multiply
   64,978.35x = 89,671.62 × 38,140.22
4. Step 4: Simplify right side
   64,978.35x = 3,420,094,866.20
5. Step 5: Solve for x
   x = 3,420,094,866.20/64,978.35
6. Step 6: Final answer
   x = 52,634.38