Finding the Fourth Proportional to 42,807.88, 64,238.55 and 30,801.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,807.88 : 64,238.55 = 30,801.25 : x
2. Step 2: Convert to fraction form
   42,807.88/64,238.55 = 30,801.25/x
3. Step 3: Cross multiply
   42,807.88x = 64,238.55 × 30,801.25
4. Step 4: Simplify right side
   42,807.88x = 1,978,627,638.19
5. Step 5: Solve for x
   x = 1,978,627,638.19/42,807.88
6. Step 6: Final answer
   x = 46,221.11