Finding the Fourth Proportional to 111,287.10, 153,573.90 and 79,509.98

Step by Step Solution

1. Step 1: Write the proportion equation
   111,287.10 : 153,573.90 = 79,509.98 : x
2. Step 2: Convert to fraction form
   111,287.10/153,573.90 = 79,509.98/x
3. Step 3: Cross multiply
   111,287.10x = 153,573.90 × 79,509.98
4. Step 4: Simplify right side
   111,287.10x = 12,210,657,717.52
5. Step 5: Solve for x
   x = 12,210,657,717.52/111,287.10
6. Step 6: Final answer
   x = 109,722.13