Finding the Fourth Proportional to 10,875.57, 16,312.24 and 2,978.79

Step by Step Solution

1. Step 1: Write the proportion equation
   10,875.57 : 16,312.24 = 2,978.79 : x
2. Step 2: Convert to fraction form
   10,875.57/16,312.24 = 2,978.79/x
3. Step 3: Cross multiply
   10,875.57x = 16,312.24 × 2,978.79
4. Step 4: Simplify right side
   10,875.57x = 48,590,737.39
5. Step 5: Solve for x
   x = 48,590,737.39/10,875.57
6. Step 6: Final answer
   x = 4,467.88