Finding the Fourth Proportional to 13,101.33, 18,090.72 and 12,151.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,101.33 : 18,090.72 = 12,151.61 : x
2. Step 2: Convert to fraction form
   13,101.33/18,090.72 = 12,151.61/x
3. Step 3: Cross multiply
   13,101.33x = 18,090.72 × 12,151.61
4. Step 4: Simplify right side
   13,101.33x = 219,831,374.06
5. Step 5: Solve for x
   x = 219,831,374.06/13,101.33
6. Step 6: Final answer
   x = 16,779.32