Finding the Fourth Proportional to 13,156.90, 19,735.95 and 7,309.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,156.90 : 19,735.95 = 7,309.10 : x
2. Step 2: Convert to fraction form
   13,156.90/19,735.95 = 7,309.10/x
3. Step 3: Cross multiply
   13,156.90x = 19,735.95 × 7,309.10
4. Step 4: Simplify right side
   13,156.90x = 144,252,108.89
5. Step 5: Solve for x
   x = 144,252,108.89/13,156.90
6. Step 6: Final answer
   x = 10,963.99