Finding the Fourth Proportional to 128,988.72, 193,538.16 and 69,755.04

Step by Step Solution

1. Step 1: Write the proportion equation
   128,988.72 : 193,538.16 = 69,755.04 : x
2. Step 2: Convert to fraction form
   128,988.72/193,538.16 = 69,755.04/x
3. Step 3: Cross multiply
   128,988.72x = 193,538.16 × 69,755.04
4. Step 4: Simplify right side
   128,988.72x = 13,500,262,092.33
5. Step 5: Solve for x
   x = 13,500,262,092.33/128,988.72
6. Step 6: Final answer
   x = 104,662.35