Finding the Fourth Proportional to 64,464.41, 89,050.59 and 61,311.60

Step by Step Solution

1. Step 1: Write the proportion equation
   64,464.41 : 89,050.59 = 61,311.60 : x
2. Step 2: Convert to fraction form
   64,464.41/89,050.59 = 61,311.60/x
3. Step 3: Cross multiply
   64,464.41x = 89,050.59 × 61,311.60
4. Step 4: Simplify right side
   64,464.41x = 5,459,834,153.84
5. Step 5: Solve for x
   x = 5,459,834,153.84/64,464.41
6. Step 6: Final answer
   x = 84,695.32