Finding the Fourth Proportional to 21,076.02, 29,090.70 and 13,113.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,076.02 : 29,090.70 = 13,113.50 : x
2. Step 2: Convert to fraction form
   21,076.02/29,090.70 = 13,113.50/x
3. Step 3: Cross multiply
   21,076.02x = 29,090.70 × 13,113.50
4. Step 4: Simplify right side
   21,076.02x = 381,480,749.00
5. Step 5: Solve for x
   x = 381,480,749.00/21,076.02
6. Step 6: Final answer
   x = 18,100.23