Finding the Fourth Proportional to 64,786.65, 89,422.28 and 42,182.11

Step by Step Solution

1. Step 1: Write the proportion equation
   64,786.65 : 89,422.28 = 42,182.11 : x
2. Step 2: Convert to fraction form
   64,786.65/89,422.28 = 42,182.11/x
3. Step 3: Cross multiply
   64,786.65x = 89,422.28 × 42,182.11
4. Step 4: Simplify right side
   64,786.65x = 3,772,020,451.41
5. Step 5: Solve for x
   x = 3,772,020,451.41/64,786.65
6. Step 6: Final answer
   x = 58,222.19