Finding the Fourth Proportional to 10,607.90, 15,906.72 and 3,210.98

Step by Step Solution

1. Step 1: Write the proportion equation
   10,607.90 : 15,906.72 = 3,210.98 : x
2. Step 2: Convert to fraction form
   10,607.90/15,906.72 = 3,210.98/x
3. Step 3: Cross multiply
   10,607.90x = 15,906.72 × 3,210.98
4. Step 4: Simplify right side
   10,607.90x = 51,076,159.79
5. Step 5: Solve for x
   x = 51,076,159.79/10,607.90
6. Step 6: Final answer
   x = 4,814.92