Finding the Fourth Proportional to 13,139.82, 19,710.70 and 3,779.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,139.82 : 19,710.70 = 3,779.46 : x
2. Step 2: Convert to fraction form
   13,139.82/19,710.70 = 3,779.46/x
3. Step 3: Cross multiply
   13,139.82x = 19,710.70 × 3,779.46
4. Step 4: Simplify right side
   13,139.82x = 74,495,802.22
5. Step 5: Solve for x
   x = 74,495,802.22/13,139.82
6. Step 6: Final answer
   x = 5,669.47