Finding the Fourth Proportional to 154,877, 213,697.30 and 91,191.56

Step by Step Solution

1. Step 1: Write the proportion equation
   154,877 : 213,697.30 = 91,191.56 : x
2. Step 2: Convert to fraction form
   154,877/213,697.30 = 91,191.56/x
3. Step 3: Cross multiply
   154,877x = 213,697.30 × 91,191.56
4. Step 4: Simplify right side
   154,877x = 19,487,390,154.79
5. Step 5: Solve for x
   x = 19,487,390,154.79/154,877
6. Step 6: Final answer
   x = 125,824.95