Finding the Fourth Proportional to 37,905, 52,310.52 and 21,138

Step by Step Solution

1. Step 1: Write the proportion equation
   37,905 : 52,310.52 = 21,138 : x
2. Step 2: Convert to fraction form
   37,905/52,310.52 = 21,138/x
3. Step 3: Cross multiply
   37,905x = 52,310.52 × 21,138
4. Step 4: Simplify right side
   37,905x = 1,105,739,771.76
5. Step 5: Solve for x
   x = 1,105,739,771.76/37,905
6. Step 6: Final answer
   x = 29,171.34