Finding the Fourth Proportional to 31,329.98, 46,985.72 and 9,137.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,329.98 : 46,985.72 = 9,137.40 : x
2. Step 2: Convert to fraction form
   31,329.98/46,985.72 = 9,137.40/x
3. Step 3: Cross multiply
   31,329.98x = 46,985.72 × 9,137.40
4. Step 4: Simplify right side
   31,329.98x = 429,327,317.93
5. Step 5: Solve for x
   x = 429,327,317.93/31,329.98
6. Step 6: Final answer
   x = 13,703.40