Finding the Fourth Proportional to 64,826.04, 89,476.58 and 42,221.36

Step by Step Solution

1. Step 1: Write the proportion equation
   64,826.04 : 89,476.58 = 42,221.36 : x
2. Step 2: Convert to fraction form
   64,826.04/89,476.58 = 42,221.36/x
3. Step 3: Cross multiply
   64,826.04x = 89,476.58 × 42,221.36
4. Step 4: Simplify right side
   64,826.04x = 3,777,822,895.75
5. Step 5: Solve for x
   x = 3,777,822,895.75/64,826.04
6. Step 6: Final answer
   x = 58,276.32