Finding the Fourth Proportional to 99,111.18, 136,774.43 and 53,789.56

Step by Step Solution

1. Step 1: Write the proportion equation
   99,111.18 : 136,774.43 = 53,789.56 : x
2. Step 2: Convert to fraction form
   99,111.18/136,774.43 = 53,789.56/x
3. Step 3: Cross multiply
   99,111.18x = 136,774.43 × 53,789.56
4. Step 4: Simplify right side
   99,111.18x = 7,357,036,408.95
5. Step 5: Solve for x
   x = 7,357,036,408.95/99,111.18
6. Step 6: Final answer
   x = 74,230.14