Finding the Fourth Proportional to 139,889.84, 209,916.16 and 58,831.03

Step by Step Solution

1. Step 1: Write the proportion equation
   139,889.84 : 209,916.16 = 58,831.03 : x
2. Step 2: Convert to fraction form
   139,889.84/209,916.16 = 58,831.03/x
3. Step 3: Cross multiply
   139,889.84x = 209,916.16 × 58,831.03
4. Step 4: Simplify right side
   139,889.84x = 12,349,584,021.76
5. Step 5: Solve for x
   x = 12,349,584,021.76/139,889.84
6. Step 6: Final answer
   x = 88,280.78