Finding the Fourth Proportional to 31,146.61, 46,707.63 and 13,604.17

Step by Step Solution

1. Step 1: Write the proportion equation
   31,146.61 : 46,707.63 = 13,604.17 : x
2. Step 2: Convert to fraction form
   31,146.61/46,707.63 = 13,604.17/x
3. Step 3: Cross multiply
   31,146.61x = 46,707.63 × 13,604.17
4. Step 4: Simplify right side
   31,146.61x = 635,418,538.82
5. Step 5: Solve for x
   x = 635,418,538.82/31,146.61
6. Step 6: Final answer
   x = 20,400.89