Finding the Fourth Proportional to 37,280.88, 55,925.12 and 12,321

Step by Step Solution

1. Step 1: Write the proportion equation
   37,280.88 : 55,925.12 = 12,321 : x
2. Step 2: Convert to fraction form
   37,280.88/55,925.12 = 12,321/x
3. Step 3: Cross multiply
   37,280.88x = 55,925.12 × 12,321
4. Step 4: Simplify right side
   37,280.88x = 689,053,403.52
5. Step 5: Solve for x
   x = 689,053,403.52/37,280.88
6. Step 6: Final answer
   x = 18,482.76