Finding the Fourth Proportional to 37,980.16, 52,410.72 and 21,209.92

Step by Step Solution

1. Step 1: Write the proportion equation
   37,980.16 : 52,410.72 = 21,209.92 : x
2. Step 2: Convert to fraction form
   37,980.16/52,410.72 = 21,209.92/x
3. Step 3: Cross multiply
   37,980.16x = 52,410.72 × 21,209.92
4. Step 4: Simplify right side
   37,980.16x = 1,111,627,178.34
5. Step 5: Solve for x
   x = 1,111,627,178.34/37,980.16
6. Step 6: Final answer
   x = 29,268.63