Finding the Fourth Proportional to 37,912.12, 52,322.28 and 21,781.72

Step by Step Solution

1. Step 1: Write the proportion equation
   37,912.12 : 52,322.28 = 21,781.72 : x
2. Step 2: Convert to fraction form
   37,912.12/52,322.28 = 21,781.72/x
3. Step 3: Cross multiply
   37,912.12x = 52,322.28 × 21,781.72
4. Step 4: Simplify right side
   37,912.12x = 1,139,669,252.72
5. Step 5: Solve for x
   x = 1,139,669,252.72/37,912.12
6. Step 6: Final answer
   x = 30,060.82