Finding the Fourth Proportional to 21,695.93, 29,931.54 and 14,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,695.93 : 29,931.54 = 14,139.50 : x
2. Step 2: Convert to fraction form
   21,695.93/29,931.54 = 14,139.50/x
3. Step 3: Cross multiply
   21,695.93x = 29,931.54 × 14,139.50
4. Step 4: Simplify right side
   21,695.93x = 423,217,009.83
5. Step 5: Solve for x
   x = 423,217,009.83/21,695.93
6. Step 6: Final answer
   x = 19,506.75