Finding the Fourth Proportional to 99,111.33, 136,771.38 and 53,789.40

Step by Step Solution

1. Step 1: Write the proportion equation
   99,111.33 : 136,771.38 = 53,789.40 : x
2. Step 2: Convert to fraction form
   99,111.33/136,771.38 = 53,789.40/x
3. Step 3: Cross multiply
   99,111.33x = 136,771.38 × 53,789.40
4. Step 4: Simplify right side
   99,111.33x = 7,356,850,467.37
5. Step 5: Solve for x
   x = 7,356,850,467.37/99,111.33
6. Step 6: Final answer
   x = 74,228.15