Finding the Fourth Proportional to 13,317.78, 19,978.59 and 4,084.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,317.78 : 19,978.59 = 4,084.50 : x
2. Step 2: Convert to fraction form
   13,317.78/19,978.59 = 4,084.50/x
3. Step 3: Cross multiply
   13,317.78x = 19,978.59 × 4,084.50
4. Step 4: Simplify right side
   13,317.78x = 81,602,550.86
5. Step 5: Solve for x
   x = 81,602,550.86/13,317.78
6. Step 6: Final answer
   x = 6,127.34