Finding the Fourth Proportional to 37,912.86, 52,320.87 and 21,145.50

Step by Step Solution

1. Step 1: Write the proportion equation
   37,912.86 : 52,320.87 = 21,145.50 : x
2. Step 2: Convert to fraction form
   37,912.86/52,320.87 = 21,145.50/x
3. Step 3: Cross multiply
   37,912.86x = 52,320.87 × 21,145.50
4. Step 4: Simplify right side
   37,912.86x = 1,106,350,956.59
5. Step 5: Solve for x
   x = 1,106,350,956.59/37,912.86
6. Step 6: Final answer
   x = 29,181.42