Finding the Fourth Proportional to 65,285.53, 89,507.29 and 64,104.55

Step by Step Solution

1. Step 1: Write the proportion equation
   65,285.53 : 89,507.29 = 64,104.55 : x
2. Step 2: Convert to fraction form
   65,285.53/89,507.29 = 64,104.55/x
3. Step 3: Cross multiply
   65,285.53x = 89,507.29 × 64,104.55
4. Step 4: Simplify right side
   65,285.53x = 5,737,824,547.17
5. Step 5: Solve for x
   x = 5,737,824,547.17/65,285.53
6. Step 6: Final answer
   x = 87,888.15