Finding the Fourth Proportional to 55,780.68, 76,980.06 and 30,630.72

Step by Step Solution

1. Step 1: Write the proportion equation
   55,780.68 : 76,980.06 = 30,630.72 : x
2. Step 2: Convert to fraction form
   55,780.68/76,980.06 = 30,630.72/x
3. Step 3: Cross multiply
   55,780.68x = 76,980.06 × 30,630.72
4. Step 4: Simplify right side
   55,780.68x = 2,357,954,663.44
5. Step 5: Solve for x
   x = 2,357,954,663.44/55,780.68
6. Step 6: Final answer
   x = 42,271.89