Finding the Fourth Proportional to 12,681.93, 17,492.76 and 7,642.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,681.93 : 17,492.76 = 7,642.74 : x
2. Step 2: Convert to fraction form
   12,681.93/17,492.76 = 7,642.74/x
3. Step 3: Cross multiply
   12,681.93x = 17,492.76 × 7,642.74
4. Step 4: Simplify right side
   12,681.93x = 133,692,616.56
5. Step 5: Solve for x
   x = 133,692,616.56/12,681.93
6. Step 6: Final answer
   x = 10,541.98