Finding the Fourth Proportional to 21,075.02, 29,089.32 and 13,112.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,075.02 : 29,089.32 = 13,112.50 : x
2. Step 2: Convert to fraction form
   21,075.02/29,089.32 = 13,112.50/x
3. Step 3: Cross multiply
   21,075.02x = 29,089.32 × 13,112.50
4. Step 4: Simplify right side
   21,075.02x = 381,433,708.50
5. Step 5: Solve for x
   x = 381,433,708.50/21,075.02
6. Step 6: Final answer
   x = 18,098.85