Finding the Fourth Proportional to 35,779.15, 53,693.33 and 12,405.59

Step by Step Solution

1. Step 1: Write the proportion equation
   35,779.15 : 53,693.33 = 12,405.59 : x
2. Step 2: Convert to fraction form
   35,779.15/53,693.33 = 12,405.59/x
3. Step 3: Cross multiply
   35,779.15x = 53,693.33 × 12,405.59
4. Step 4: Simplify right side
   35,779.15x = 666,097,169.25
5. Step 5: Solve for x
   x = 666,097,169.25/35,779.15
6. Step 6: Final answer
   x = 18,616.91