Finding the Fourth Proportional to 65,281.87, 89,502.28 and 64,100.89

Step by Step Solution

1. Step 1: Write the proportion equation
   65,281.87 : 89,502.28 = 64,100.89 : x
2. Step 2: Convert to fraction form
   65,281.87/89,502.28 = 64,100.89/x
3. Step 3: Cross multiply
   65,281.87x = 89,502.28 × 64,100.89
4. Step 4: Simplify right side
   65,281.87x = 5,737,175,421.02
5. Step 5: Solve for x
   x = 5,737,175,421.02/65,281.87
6. Step 6: Final answer
   x = 87,883.14