Finding the Fourth Proportional to 56,870.82, 78,392.42 and 38,934.72

Step by Step Solution

1. Step 1: Write the proportion equation
   56,870.82 : 78,392.42 = 38,934.72 : x
2. Step 2: Convert to fraction form
   56,870.82/78,392.42 = 38,934.72/x
3. Step 3: Cross multiply
   56,870.82x = 78,392.42 × 38,934.72
4. Step 4: Simplify right side
   56,870.82x = 3,052,186,922.82
5. Step 5: Solve for x
   x = 3,052,186,922.82/56,870.82
6. Step 6: Final answer
   x = 53,668.77