Finding the Fourth Proportional to 53,140.78, 73,337.36 and 30,479.61

Step by Step Solution

1. Step 1: Write the proportion equation
   53,140.78 : 73,337.36 = 30,479.61 : x
2. Step 2: Convert to fraction form
   53,140.78/73,337.36 = 30,479.61/x
3. Step 3: Cross multiply
   53,140.78x = 73,337.36 × 30,479.61
4. Step 4: Simplify right side
   53,140.78x = 2,235,293,978.83
5. Step 5: Solve for x
   x = 2,235,293,978.83/53,140.78
6. Step 6: Final answer
   x = 42,063.63