Finding the Fourth Proportional to 51,048.72, 70,430.98 and 30,899.16

Step by Step Solution

1. Step 1: Write the proportion equation
   51,048.72 : 70,430.98 = 30,899.16 : x
2. Step 2: Convert to fraction form
   51,048.72/70,430.98 = 30,899.16/x
3. Step 3: Cross multiply
   51,048.72x = 70,430.98 × 30,899.16
4. Step 4: Simplify right side
   51,048.72x = 2,176,258,119.98
5. Step 5: Solve for x
   x = 2,176,258,119.98/51,048.72
6. Step 6: Final answer
   x = 42,631.00