Finding the Fourth Proportional to 13,779.30, 19,016.91 and 7,810.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,779.30 : 19,016.91 = 7,810.32 : x
2. Step 2: Convert to fraction form
   13,779.30/19,016.91 = 7,810.32/x
3. Step 3: Cross multiply
   13,779.30x = 19,016.91 × 7,810.32
4. Step 4: Simplify right side
   13,779.30x = 148,528,152.51
5. Step 5: Solve for x
   x = 148,528,152.51/13,779.30
6. Step 6: Final answer
   x = 10,779.08