Finding the Fourth Proportional to 209,055.87, 288,499.86 and 113,564.16

Step by Step Solution

1. Step 1: Write the proportion equation
   209,055.87 : 288,499.86 = 113,564.16 : x
2. Step 2: Convert to fraction form
   209,055.87/288,499.86 = 113,564.16/x
3. Step 3: Cross multiply
   209,055.87x = 288,499.86 × 113,564.16
4. Step 4: Simplify right side
   209,055.87x = 32,763,244,261.02
5. Step 5: Solve for x
   x = 32,763,244,261.02/209,055.87
6. Step 6: Final answer
   x = 156,720.04