Finding the Fourth Proportional to 21,710.81, 29,962.35 and 12,151.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,710.81 : 29,962.35 = 12,151.59 : x
2. Step 2: Convert to fraction form
   21,710.81/29,962.35 = 12,151.59/x
3. Step 3: Cross multiply
   21,710.81x = 29,962.35 × 12,151.59
4. Step 4: Simplify right side
   21,710.81x = 364,090,192.64
5. Step 5: Solve for x
   x = 364,090,192.64/21,710.81
6. Step 6: Final answer
   x = 16,770.00