Finding the Fourth Proportional to 538,870.71, 743,659.53 and 293,868.87

Step by Step Solution

1. Step 1: Write the proportion equation
   538,870.71 : 743,659.53 = 293,868.87 : x
2. Step 2: Convert to fraction form
   538,870.71/743,659.53 = 293,868.87/x
3. Step 3: Cross multiply
   538,870.71x = 743,659.53 × 293,868.87
4. Step 4: Simplify right side
   538,870.71x = 218,538,385,745.83
5. Step 5: Solve for x
   x = 218,538,385,745.83/538,870.71
6. Step 6: Final answer
   x = 405,548.83