Finding the Fourth Proportional to 55,628, 76,766.64 and 30,478.08

Step by Step Solution

1. Step 1: Write the proportion equation
   55,628 : 76,766.64 = 30,478.08 : x
2. Step 2: Convert to fraction form
   55,628/76,766.64 = 30,478.08/x
3. Step 3: Cross multiply
   55,628x = 76,766.64 × 30,478.08
4. Step 4: Simplify right side
   55,628x = 2,339,699,795.25
5. Step 5: Solve for x
   x = 2,339,699,795.25/55,628
6. Step 6: Final answer
   x = 42,059.75