Finding the Fourth Proportional to 111,538.08, 153,941.04 and 71,271.72

Step by Step Solution

1. Step 1: Write the proportion equation
   111,538.08 : 153,941.04 = 71,271.72 : x
2. Step 2: Convert to fraction form
   111,538.08/153,941.04 = 71,271.72/x
3. Step 3: Cross multiply
   111,538.08x = 153,941.04 × 71,271.72
4. Step 4: Simplify right side
   111,538.08x = 10,971,642,699.39
5. Step 5: Solve for x
   x = 10,971,642,699.39/111,538.08
6. Step 6: Final answer
   x = 98,366.79