Finding the Fourth Proportional to 31,797, 47,700.72 and 13,071.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,797 : 47,700.72 = 13,071.96 : x
2. Step 2: Convert to fraction form
   31,797/47,700.72 = 13,071.96/x
3. Step 3: Cross multiply
   31,797x = 47,700.72 × 13,071.96
4. Step 4: Simplify right side
   31,797x = 623,541,903.81
5. Step 5: Solve for x
   x = 623,541,903.81/31,797
6. Step 6: Final answer
   x = 19,610.09