Finding the Fourth Proportional to 13,994.34, 19,312.56 and 7,707.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,994.34 : 19,312.56 = 7,707.12 : x
2. Step 2: Convert to fraction form
   13,994.34/19,312.56 = 7,707.12/x
3. Step 3: Cross multiply
   13,994.34x = 19,312.56 × 7,707.12
4. Step 4: Simplify right side
   13,994.34x = 148,844,217.43
5. Step 5: Solve for x
   x = 148,844,217.43/13,994.34
6. Step 6: Final answer
   x = 10,636.03