Finding the Fourth Proportional to 64,828.03, 89,479.35 and 42,223.36

Step by Step Solution

1. Step 1: Write the proportion equation
   64,828.03 : 89,479.35 = 42,223.36 : x
2. Step 2: Convert to fraction form
   64,828.03/89,479.35 = 42,223.36/x
3. Step 3: Cross multiply
   64,828.03x = 89,479.35 × 42,223.36
4. Step 4: Simplify right side
   64,828.03x = 3,778,118,807.62
5. Step 5: Solve for x
   x = 3,778,118,807.62/64,828.03
6. Step 6: Final answer
   x = 58,279.09