Finding the Fourth Proportional to 65,012.32, 89,372.46 and 55,904.28

Step by Step Solution

1. Step 1: Write the proportion equation
   65,012.32 : 89,372.46 = 55,904.28 : x
2. Step 2: Convert to fraction form
   65,012.32/89,372.46 = 55,904.28/x
3. Step 3: Cross multiply
   65,012.32x = 89,372.46 × 55,904.28
4. Step 4: Simplify right side
   65,012.32x = 4,996,302,902.62
5. Step 5: Solve for x
   x = 4,996,302,902.62/65,012.32
6. Step 6: Final answer
   x = 76,851.63