Finding the Fourth Proportional to 111,573.60, 167,389.56 and 64,786.20

Step by Step Solution

1. Step 1: Write the proportion equation
   111,573.60 : 167,389.56 = 64,786.20 : x
2. Step 2: Convert to fraction form
   111,573.60/167,389.56 = 64,786.20/x
3. Step 3: Cross multiply
   111,573.60x = 167,389.56 × 64,786.20
4. Step 4: Simplify right side
   111,573.60x = 10,844,533,512.07
5. Step 5: Solve for x
   x = 10,844,533,512.07/111,573.60
6. Step 6: Final answer
   x = 97,196.23