Finding the Fourth Proportional to 64,987.92, 89,650.13 and 42,364.76

Step by Step Solution

1. Step 1: Write the proportion equation
   64,987.92 : 89,650.13 = 42,364.76 : x
2. Step 2: Convert to fraction form
   64,987.92/89,650.13 = 42,364.76/x
3. Step 3: Cross multiply
   64,987.92x = 89,650.13 × 42,364.76
4. Step 4: Simplify right side
   64,987.92x = 3,798,005,581.34
5. Step 5: Solve for x
   x = 3,798,005,581.34/64,987.92
6. Step 6: Final answer
   x = 58,441.72