Finding the Fourth Proportional to 37,200.15, 51,336.45 and 21,285

Step by Step Solution

1. Step 1: Write the proportion equation
   37,200.15 : 51,336.45 = 21,285 : x
2. Step 2: Convert to fraction form
   37,200.15/51,336.45 = 21,285/x
3. Step 3: Cross multiply
   37,200.15x = 51,336.45 × 21,285
4. Step 4: Simplify right side
   37,200.15x = 1,092,696,338.25
5. Step 5: Solve for x
   x = 1,092,696,338.25/37,200.15
6. Step 6: Final answer
   x = 29,373.44