Finding the Fourth Proportional to 13,961.90, 20,784.52 and 13,887.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,961.90 : 20,784.52 = 13,887.98 : x
2. Step 2: Convert to fraction form
   13,961.90/20,784.52 = 13,887.98/x
3. Step 3: Cross multiply
   13,961.90x = 20,784.52 × 13,887.98
4. Step 4: Simplify right side
   13,961.90x = 288,654,998.07
5. Step 5: Solve for x
   x = 288,654,998.07/13,961.90
6. Step 6: Final answer
   x = 20,674.48