Finding the Fourth Proportional to 51,895.78, 71,611.32 and 30,670.90

Step by Step Solution

1. Step 1: Write the proportion equation
   51,895.78 : 71,611.32 = 30,670.90 : x
2. Step 2: Convert to fraction form
   51,895.78/71,611.32 = 30,670.90/x
3. Step 3: Cross multiply
   51,895.78x = 71,611.32 × 30,670.90
4. Step 4: Simplify right side
   51,895.78x = 2,196,383,634.59
5. Step 5: Solve for x
   x = 2,196,383,634.59/51,895.78
6. Step 6: Final answer
   x = 42,322.97