Finding the Fourth Proportional to 1,139,548.32, 1,709,419.68 and 298,098.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139,548.32 : 1,709,419.68 = 298,098.72 : x
2. Step 2: Convert to fraction form
   1,139,548.32/1,709,419.68 = 298,098.72/x
3. Step 3: Cross multiply
   1,139,548.32x = 1,709,419.68 × 298,098.72
4. Step 4: Simplify right side
   1,139,548.32x = 509,575,818,550.81
5. Step 5: Solve for x
   x = 509,575,818,550.81/1,139,548.32
6. Step 6: Final answer
   x = 447,173.51