Finding the Fourth Proportional to 37,758.40, 56,638.56 and 21,109.12

Step by Step Solution

1. Step 1: Write the proportion equation
   37,758.40 : 56,638.56 = 21,109.12 : x
2. Step 2: Convert to fraction form
   37,758.40/56,638.56 = 21,109.12/x
3. Step 3: Cross multiply
   37,758.40x = 56,638.56 × 21,109.12
4. Step 4: Simplify right side
   37,758.40x = 1,195,590,159.67
5. Step 5: Solve for x
   x = 1,195,590,159.67/37,758.40
6. Step 6: Final answer
   x = 31,664.22