Finding the Fourth Proportional to 64,839.57, 89,478.52 and 35,031.57

Step by Step Solution

1. Step 1: Write the proportion equation
   64,839.57 : 89,478.52 = 35,031.57 : x
2. Step 2: Convert to fraction form
   64,839.57/89,478.52 = 35,031.57/x
3. Step 3: Cross multiply
   64,839.57x = 89,478.52 × 35,031.57
4. Step 4: Simplify right side
   64,839.57x = 3,134,573,036.88
5. Step 5: Solve for x
   x = 3,134,573,036.88/64,839.57
6. Step 6: Final answer
   x = 48,343.52