Finding the Fourth Proportional to 12,386.03, 17,106.91 and 8,156.00

Step by Step Solution

1. Step 1: Write the proportion equation
   12,386.03 : 17,106.91 = 8,156.00 : x
2. Step 2: Convert to fraction form
   12,386.03/17,106.91 = 8,156.00/x
3. Step 3: Cross multiply
   12,386.03x = 17,106.91 × 8,156.00
4. Step 4: Simplify right side
   12,386.03x = 139,523,892.82
5. Step 5: Solve for x
   x = 139,523,892.82/12,386.03
6. Step 6: Final answer
   x = 11,264.62