Finding the Fourth Proportional to 51,021.32, 70,392.60 and 30,870.54

Step by Step Solution

1. Step 1: Write the proportion equation
   51,021.32 : 70,392.60 = 30,870.54 : x
2. Step 2: Convert to fraction form
   51,021.32/70,392.60 = 30,870.54/x
3. Step 3: Cross multiply
   51,021.32x = 70,392.60 × 30,870.54
4. Step 4: Simplify right side
   51,021.32x = 2,173,057,574.00
5. Step 5: Solve for x
   x = 2,173,057,574.00/51,021.32
6. Step 6: Final answer
   x = 42,591.17