Finding the Fourth Proportional to 111,680.32, 153,959.52 and 79,837.60

Step by Step Solution

1. Step 1: Write the proportion equation
   111,680.32 : 153,959.52 = 79,837.60 : x
2. Step 2: Convert to fraction form
   111,680.32/153,959.52 = 79,837.60/x
3. Step 3: Cross multiply
   111,680.32x = 153,959.52 × 79,837.60
4. Step 4: Simplify right side
   111,680.32x = 12,291,758,573.95
5. Step 5: Solve for x
   x = 12,291,758,573.95/111,680.32
6. Step 6: Final answer
   x = 110,061.99