Finding the Fourth Proportional to 31,780.86, 47,663.24 and 13,066.07

Step by Step Solution

1. Step 1: Write the proportion equation
   31,780.86 : 47,663.24 = 13,066.07 : x
2. Step 2: Convert to fraction form
   31,780.86/47,663.24 = 13,066.07/x
3. Step 3: Cross multiply
   31,780.86x = 47,663.24 × 13,066.07
4. Step 4: Simplify right side
   31,780.86x = 622,770,926.62
5. Step 5: Solve for x
   x = 622,770,926.62/31,780.86
6. Step 6: Final answer
   x = 19,595.79