Finding the Fourth Proportional to 139,974.35, 210,042.74 and 58,915.33

Step by Step Solution

1. Step 1: Write the proportion equation
   139,974.35 : 210,042.74 = 58,915.33 : x
2. Step 2: Convert to fraction form
   139,974.35/210,042.74 = 58,915.33/x
3. Step 3: Cross multiply
   139,974.35x = 210,042.74 × 58,915.33
4. Step 4: Simplify right side
   139,974.35x = 12,374,736,521.52
5. Step 5: Solve for x
   x = 12,374,736,521.52/139,974.35
6. Step 6: Final answer
   x = 88,407.17