Finding the Fourth Proportional to 56,071.12, 77,376.72 and 30,919

Step by Step Solution

1. Step 1: Write the proportion equation
   56,071.12 : 77,376.72 = 30,919 : x
2. Step 2: Convert to fraction form
   56,071.12/77,376.72 = 30,919/x
3. Step 3: Cross multiply
   56,071.12x = 77,376.72 × 30,919
4. Step 4: Simplify right side
   56,071.12x = 2,392,410,805.68
5. Step 5: Solve for x
   x = 2,392,410,805.68/56,071.12
6. Step 6: Final answer
   x = 42,667.43