Finding the Fourth Proportional to 31,008.36, 42,719.22 and 21,560.52

Step by Step Solution

1. Step 1: Write the proportion equation
   31,008.36 : 42,719.22 = 21,560.52 : x
2. Step 2: Convert to fraction form
   31,008.36/42,719.22 = 21,560.52/x
3. Step 3: Cross multiply
   31,008.36x = 42,719.22 × 21,560.52
4. Step 4: Simplify right side
   31,008.36x = 921,048,597.19
5. Step 5: Solve for x
   x = 921,048,597.19/31,008.36
6. Step 6: Final answer
   x = 29,703.23