Finding the Fourth Proportional to 537,131.59, 805,697.56 and 137,772.31

Step by Step Solution

1. Step 1: Write the proportion equation
   537,131.59 : 805,697.56 = 137,772.31 : x
2. Step 2: Convert to fraction form
   537,131.59/805,697.56 = 137,772.31/x
3. Step 3: Cross multiply
   537,131.59x = 805,697.56 × 137,772.31
4. Step 4: Simplify right side
   537,131.59x = 111,002,814,002.56
5. Step 5: Solve for x
   x = 111,002,814,002.56/537,131.59
6. Step 6: Final answer
   x = 206,658.51