Finding the Fourth Proportional to 37,978.40, 52,409.62 and 21,845.22

Step by Step Solution

1. Step 1: Write the proportion equation
   37,978.40 : 52,409.62 = 21,845.22 : x
2. Step 2: Convert to fraction form
   37,978.40/52,409.62 = 21,845.22/x
3. Step 3: Cross multiply
   37,978.40x = 52,409.62 × 21,845.22
4. Step 4: Simplify right side
   37,978.40x = 1,144,899,679.02
5. Step 5: Solve for x
   x = 1,144,899,679.02/37,978.40
6. Step 6: Final answer
   x = 30,146.07