Finding the Fourth Proportional to 37,980.32, 56,971.38 and 13,020.18

Step by Step Solution

1. Step 1: Write the proportion equation
   37,980.32 : 56,971.38 = 13,020.18 : x
2. Step 2: Convert to fraction form
   37,980.32/56,971.38 = 13,020.18/x
3. Step 3: Cross multiply
   37,980.32x = 56,971.38 × 13,020.18
4. Step 4: Simplify right side
   37,980.32x = 741,777,622.45
5. Step 5: Solve for x
   x = 741,777,622.45/37,980.32
6. Step 6: Final answer
   x = 19,530.58