Finding the Fourth Proportional to 14,139.76, 21,210.18 and 3,751.60

Step by Step Solution

1. Step 1: Write the proportion equation
   14,139.76 : 21,210.18 = 3,751.60 : x
2. Step 2: Convert to fraction form
   14,139.76/21,210.18 = 3,751.60/x
3. Step 3: Cross multiply
   14,139.76x = 21,210.18 × 3,751.60
4. Step 4: Simplify right side
   14,139.76x = 79,572,111.29
5. Step 5: Solve for x
   x = 79,572,111.29/14,139.76
6. Step 6: Final answer
   x = 5,627.54