Finding the Fourth Proportional to 111,805.60, 167,362.80 and 64,919.20

Step by Step Solution

1. Step 1: Write the proportion equation
   111,805.60 : 167,362.80 = 64,919.20 : x
2. Step 2: Convert to fraction form
   111,805.60/167,362.80 = 64,919.20/x
3. Step 3: Cross multiply
   111,805.60x = 167,362.80 × 64,919.20
4. Step 4: Simplify right side
   111,805.60x = 10,865,059,085.76
5. Step 5: Solve for x
   x = 10,865,059,085.76/111,805.60
6. Step 6: Final answer
   x = 97,178.13