Finding the Fourth Proportional to 111,538.01, 167,307.32 and 78,406.38

Step by Step Solution

1. Step 1: Write the proportion equation
   111,538.01 : 167,307.32 = 78,406.38 : x
2. Step 2: Convert to fraction form
   111,538.01/167,307.32 = 78,406.38/x
3. Step 3: Cross multiply
   111,538.01x = 167,307.32 × 78,406.38
4. Step 4: Simplify right side
   111,538.01x = 13,117,961,504.72
5. Step 5: Solve for x
   x = 13,117,961,504.72/111,538.01
6. Step 6: Final answer
   x = 117,609.78