Finding the Fourth Proportional to 31,907.52, 47,877.42 and 13,200.98

Step by Step Solution

1. Step 1: Write the proportion equation
   31,907.52 : 47,877.42 = 13,200.98 : x
2. Step 2: Convert to fraction form
   31,907.52/47,877.42 = 13,200.98/x
3. Step 3: Cross multiply
   31,907.52x = 47,877.42 × 13,200.98
4. Step 4: Simplify right side
   31,907.52x = 632,028,902.38
5. Step 5: Solve for x
   x = 632,028,902.38/31,907.52
6. Step 6: Final answer
   x = 19,808.15