Finding the Fourth Proportional to 1,139,658.72, 1,709,440.56 and 298,191.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139,658.72 : 1,709,440.56 = 298,191.84 : x
2. Step 2: Convert to fraction form
   1,139,658.72/1,709,440.56 = 298,191.84/x
3. Step 3: Cross multiply
   1,139,658.72x = 1,709,440.56 × 298,191.84
4. Step 4: Simplify right side
   1,139,658.72x = 509,741,225,957.03
5. Step 5: Solve for x
   x = 509,741,225,957.03/1,139,658.72
6. Step 6: Final answer
   x = 447,275.33