Finding the Fourth Proportional to 139,071.77, 191,922.82 and 78,651.44

Step by Step Solution

1. Step 1: Write the proportion equation
   139,071.77 : 191,922.82 = 78,651.44 : x
2. Step 2: Convert to fraction form
   139,071.77/191,922.82 = 78,651.44/x
3. Step 3: Cross multiply
   139,071.77x = 191,922.82 × 78,651.44
4. Step 4: Simplify right side
   139,071.77x = 15,095,005,725.33
5. Step 5: Solve for x
   x = 15,095,005,725.33/139,071.77
6. Step 6: Final answer
   x = 108,541.12