Finding the Fourth Proportional to 565,538.50, 848,300.35 and 139,078.02

Step by Step Solution

1. Step 1: Write the proportion equation
   565,538.50 : 848,300.35 = 139,078.02 : x
2. Step 2: Convert to fraction form
   565,538.50/848,300.35 = 139,078.02/x
3. Step 3: Cross multiply
   565,538.50x = 848,300.35 × 139,078.02
4. Step 4: Simplify right side
   565,538.50x = 117,979,933,043.31
5. Step 5: Solve for x
   x = 117,979,933,043.31/565,538.50
6. Step 6: Final answer
   x = 208,615.21