Finding the Fourth Proportional to 64,800.70, 89,441.64 and 42,196.12

Step by Step Solution

1. Step 1: Write the proportion equation
   64,800.70 : 89,441.64 = 42,196.12 : x
2. Step 2: Convert to fraction form
   64,800.70/89,441.64 = 42,196.12/x
3. Step 3: Cross multiply
   64,800.70x = 89,441.64 × 42,196.12
4. Step 4: Simplify right side
   64,800.70x = 3,774,090,174.44
5. Step 5: Solve for x
   x = 3,774,090,174.44/64,800.70
6. Step 6: Final answer
   x = 58,241.50