Finding the Fourth Proportional to 37,818.84, 52,181.40 and 21,678.72

Step by Step Solution

1. Step 1: Write the proportion equation
   37,818.84 : 52,181.40 = 21,678.72 : x
2. Step 2: Convert to fraction form
   37,818.84/52,181.40 = 21,678.72/x
3. Step 3: Cross multiply
   37,818.84x = 52,181.40 × 21,678.72
4. Step 4: Simplify right side
   37,818.84x = 1,131,225,959.81
5. Step 5: Solve for x
   x = 1,131,225,959.81/37,818.84
6. Step 6: Final answer
   x = 29,911.70