Finding the Fourth Proportional to 64,801.70, 89,443.02 and 42,197.12

Step by Step Solution

1. Step 1: Write the proportion equation
   64,801.70 : 89,443.02 = 42,197.12 : x
2. Step 2: Convert to fraction form
   64,801.70/89,443.02 = 42,197.12/x
3. Step 3: Cross multiply
   64,801.70x = 89,443.02 × 42,197.12
4. Step 4: Simplify right side
   64,801.70x = 3,774,237,848.10
5. Step 5: Solve for x
   x = 3,774,237,848.10/64,801.70
6. Step 6: Final answer
   x = 58,242.88