Finding the Fourth Proportional to 64,148.25, 88,524.72 and 42,978.09

Step by Step Solution

1. Step 1: Write the proportion equation
   64,148.25 : 88,524.72 = 42,978.09 : x
2. Step 2: Convert to fraction form
   64,148.25/88,524.72 = 42,978.09/x
3. Step 3: Cross multiply
   64,148.25x = 88,524.72 × 42,978.09
4. Step 4: Simplify right side
   64,148.25x = 3,804,623,383.38
5. Step 5: Solve for x
   x = 3,804,623,383.38/64,148.25
6. Step 6: Final answer
   x = 59,309.85