Finding the Fourth Proportional to 53,621.63, 74,005.50 and 30,956.09

Step by Step Solution

1. Step 1: Write the proportion equation
   53,621.63 : 74,005.50 = 30,956.09 : x
2. Step 2: Convert to fraction form
   53,621.63/74,005.50 = 30,956.09/x
3. Step 3: Cross multiply
   53,621.63x = 74,005.50 × 30,956.09
4. Step 4: Simplify right side
   53,621.63x = 2,290,920,918.50
5. Step 5: Solve for x
   x = 2,290,920,918.50/53,621.63
6. Step 6: Final answer
   x = 42,723.82