Finding the Fourth Proportional to 13,779.48, 19,017.17 and 7,810.51

Step by Step Solution

1. Step 1: Write the proportion equation
   13,779.48 : 19,017.17 = 7,810.51 : x
2. Step 2: Convert to fraction form
   13,779.48/19,017.17 = 7,810.51/x
3. Step 3: Cross multiply
   13,779.48x = 19,017.17 × 7,810.51
4. Step 4: Simplify right side
   13,779.48x = 148,533,796.46
5. Step 5: Solve for x
   x = 148,533,796.46/13,779.48
6. Step 6: Final answer
   x = 10,779.35