Finding the Fourth Proportional to 527,561.89, 791,342.76 and 128,199.89

Step by Step Solution

1. Step 1: Write the proportion equation
   527,561.89 : 791,342.76 = 128,199.89 : x
2. Step 2: Convert to fraction form
   527,561.89/791,342.76 = 128,199.89/x
3. Step 3: Cross multiply
   527,561.89x = 791,342.76 × 128,199.89
4. Step 4: Simplify right side
   527,561.89x = 101,450,054,784.30
5. Step 5: Solve for x
   x = 101,450,054,784.30/527,561.89
6. Step 6: Final answer
   x = 192,299.82