Finding the Fourth Proportional to 64,814, 89,482.20 and 42,496.88

Step by Step Solution

1. Step 1: Write the proportion equation
   64,814 : 89,482.20 = 42,496.88 : x
2. Step 2: Convert to fraction form
   64,814/89,482.20 = 42,496.88/x
3. Step 3: Cross multiply
   64,814x = 89,482.20 × 42,496.88
4. Step 4: Simplify right side
   64,814x = 3,802,714,315.54
5. Step 5: Solve for x
   x = 3,802,714,315.54/64,814
6. Step 6: Final answer
   x = 58,671.19