Finding the Fourth Proportional to 64,438.58, 88,920.69 and 35,759.72

Step by Step Solution

1. Step 1: Write the proportion equation
   64,438.58 : 88,920.69 = 35,759.72 : x
2. Step 2: Convert to fraction form
   64,438.58/88,920.69 = 35,759.72/x
3. Step 3: Cross multiply
   64,438.58x = 88,920.69 × 35,759.72
4. Step 4: Simplify right side
   64,438.58x = 3,179,778,976.61
5. Step 5: Solve for x
   x = 3,179,778,976.61/64,438.58
6. Step 6: Final answer
   x = 49,345.89