Finding the Fourth Proportional to 64,145.75, 88,521.27 and 42,975.59

Step by Step Solution

1. Step 1: Write the proportion equation
   64,145.75 : 88,521.27 = 42,975.59 : x
2. Step 2: Convert to fraction form
   64,145.75/88,521.27 = 42,975.59/x
3. Step 3: Cross multiply
   64,145.75x = 88,521.27 × 42,975.59
4. Step 4: Simplify right side
   64,145.75x = 3,804,253,805.80
5. Step 5: Solve for x
   x = 3,804,253,805.80/64,145.75
6. Step 6: Final answer
   x = 59,306.40