Finding the Fourth Proportional to 542,189.76, 748,250.64 and 300,498.72

Step by Step Solution

1. Step 1: Write the proportion equation
   542,189.76 : 748,250.64 = 300,498.72 : x
2. Step 2: Convert to fraction form
   542,189.76/748,250.64 = 300,498.72/x
3. Step 3: Cross multiply
   542,189.76x = 748,250.64 × 300,498.72
4. Step 4: Simplify right side
   542,189.76x = 224,848,359,559.18
5. Step 5: Solve for x
   x = 224,848,359,559.18/542,189.76
6. Step 6: Final answer
   x = 414,704.18