Finding the Fourth Proportional to 53,215.32, 73,430.22 and 30,555.30

Step by Step Solution

1. Step 1: Write the proportion equation
   53,215.32 : 73,430.22 = 30,555.30 : x
2. Step 2: Convert to fraction form
   53,215.32/73,430.22 = 30,555.30/x
3. Step 3: Cross multiply
   53,215.32x = 73,430.22 × 30,555.30
4. Step 4: Simplify right side
   53,215.32x = 2,243,682,401.17
5. Step 5: Solve for x
   x = 2,243,682,401.17/53,215.32
6. Step 6: Final answer
   x = 42,162.34