Finding the Fourth Proportional to 31,051.02, 42,900.51 and 21,661.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,051.02 : 42,900.51 = 21,661.50 : x
2. Step 2: Convert to fraction form
   31,051.02/42,900.51 = 21,661.50/x
3. Step 3: Cross multiply
   31,051.02x = 42,900.51 × 21,661.50
4. Step 4: Simplify right side
   31,051.02x = 929,289,397.37
5. Step 5: Solve for x
   x = 929,289,397.37/31,051.02
6. Step 6: Final answer
   x = 29,927.82