Finding the Fourth Proportional to 139,411.46, 192,289.29 and 85,726.82

Step by Step Solution

1. Step 1: Write the proportion equation
   139,411.46 : 192,289.29 = 85,726.82 : x
2. Step 2: Convert to fraction form
   139,411.46/192,289.29 = 85,726.82/x
3. Step 3: Cross multiply
   139,411.46x = 192,289.29 × 85,726.82
4. Step 4: Simplify right side
   139,411.46x = 16,484,349,351.76
5. Step 5: Solve for x
   x = 16,484,349,351.76/139,411.46
6. Step 6: Final answer
   x = 118,242.43