Finding the Fourth Proportional to 30,567.60, 42,823.80 and 30,567.60

Step by Step Solution

1. Step 1: Write the proportion equation
   30,567.60 : 42,823.80 = 30,567.60 : x
2. Step 2: Convert to fraction form
   30,567.60/42,823.80 = 30,567.60/x
3. Step 3: Cross multiply
   30,567.60x = 42,823.80 × 30,567.60
4. Step 4: Simplify right side
   30,567.60x = 1,309,020,788.88
5. Step 5: Solve for x
   x = 1,309,020,788.88/30,567.60
6. Step 6: Final answer
   x = 42,823.80