Finding the Fourth Proportional to 154,886, 213,709.72 and 91,200.56

Step by Step Solution

1. Step 1: Write the proportion equation
   154,886 : 213,709.72 = 91,200.56 : x
2. Step 2: Convert to fraction form
   154,886/213,709.72 = 91,200.56/x
3. Step 3: Cross multiply
   154,886x = 213,709.72 × 91,200.56
4. Step 4: Simplify right side
   154,886x = 19,490,446,141.44
5. Step 5: Solve for x
   x = 19,490,446,141.44/154,886
6. Step 6: Final answer
   x = 125,837.37