Finding the Fourth Proportional to 56,212.42, 77,570.76 and 30,718.18

Step by Step Solution

1. Step 1: Write the proportion equation
   56,212.42 : 77,570.76 = 30,718.18 : x
2. Step 2: Convert to fraction form
   56,212.42/77,570.76 = 30,718.18/x
3. Step 3: Cross multiply
   56,212.42x = 77,570.76 × 30,718.18
4. Step 4: Simplify right side
   56,212.42x = 2,382,832,568.42
5. Step 5: Solve for x
   x = 2,382,832,568.42/56,212.42
6. Step 6: Final answer
   x = 42,389.79