Finding the Fourth Proportional to 762,667.98, 1,144,303.29 and 289,478.94

Step by Step Solution

1. Step 1: Write the proportion equation
   762,667.98 : 1,144,303.29 = 289,478.94 : x
2. Step 2: Convert to fraction form
   762,667.98/1,144,303.29 = 289,478.94/x
3. Step 3: Cross multiply
   762,667.98x = 1,144,303.29 × 289,478.94
4. Step 4: Simplify right side
   762,667.98x = 331,251,703,427.71
5. Step 5: Solve for x
   x = 331,251,703,427.71/762,667.98
6. Step 6: Final answer
   x = 434,332.78