Finding the Fourth Proportional to 37,918.64, 52,328.76 and 21,152.72

Step by Step Solution

1. Step 1: Write the proportion equation
   37,918.64 : 52,328.76 = 21,152.72 : x
2. Step 2: Convert to fraction form
   37,918.64/52,328.76 = 21,152.72/x
3. Step 3: Cross multiply
   37,918.64x = 52,328.76 × 21,152.72
4. Step 4: Simplify right side
   37,918.64x = 1,106,895,608.23
5. Step 5: Solve for x
   x = 1,106,895,608.23/37,918.64
6. Step 6: Final answer
   x = 29,191.33