Finding the Fourth Proportional to 64,907.80, 89,502.15 and 42,204.69

Step by Step Solution

1. Step 1: Write the proportion equation
   64,907.80 : 89,502.15 = 42,204.69 : x
2. Step 2: Convert to fraction form
   64,907.80/89,502.15 = 42,204.69/x
3. Step 3: Cross multiply
   64,907.80x = 89,502.15 × 42,204.69
4. Step 4: Simplify right side
   64,907.80x = 3,777,410,881.03
5. Step 5: Solve for x
   x = 3,777,410,881.03/64,907.80
6. Step 6: Final answer
   x = 58,196.56