Finding the Fourth Proportional to 31,892.61, 47,807.67 and 11,887.47

Step by Step Solution

1. Step 1: Write the proportion equation
   31,892.61 : 47,807.67 = 11,887.47 : x
2. Step 2: Convert to fraction form
   31,892.61/47,807.67 = 11,887.47/x
3. Step 3: Cross multiply
   31,892.61x = 47,807.67 × 11,887.47
4. Step 4: Simplify right side
   31,892.61x = 568,312,242.89
5. Step 5: Solve for x
   x = 568,312,242.89/31,892.61
6. Step 6: Final answer
   x = 17,819.56