Finding the Fourth Proportional to 13,779.80, 19,017.60 and 7,810.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,779.80 : 19,017.60 = 7,810.82 : x
2. Step 2: Convert to fraction form
   13,779.80/19,017.60 = 7,810.82/x
3. Step 3: Cross multiply
   13,779.80x = 19,017.60 × 7,810.82
4. Step 4: Simplify right side
   13,779.80x = 148,543,050.43
5. Step 5: Solve for x
   x = 148,543,050.43/13,779.80
6. Step 6: Final answer
   x = 10,779.77