Finding the Fourth Proportional to 111,888.45, 168,445.15 and 102,090.69

Step by Step Solution

1. Step 1: Write the proportion equation
   111,888.45 : 168,445.15 = 102,090.69 : x
2. Step 2: Convert to fraction form
   111,888.45/168,445.15 = 102,090.69/x
3. Step 3: Cross multiply
   111,888.45x = 168,445.15 × 102,090.69
4. Step 4: Simplify right side
   111,888.45x = 17,196,681,335.43
5. Step 5: Solve for x
   x = 17,196,681,335.43/111,888.45
6. Step 6: Final answer
   x = 153,694.87