Finding the Fourth Proportional to 139,004.57, 191,824.22 and 78,573.09

Step by Step Solution

1. Step 1: Write the proportion equation
   139,004.57 : 191,824.22 = 78,573.09 : x
2. Step 2: Convert to fraction form
   139,004.57/191,824.22 = 78,573.09/x
3. Step 3: Cross multiply
   139,004.57x = 191,824.22 × 78,573.09
4. Step 4: Simplify right side
   139,004.57x = 15,072,221,702.24
5. Step 5: Solve for x
   x = 15,072,221,702.24/139,004.57
6. Step 6: Final answer
   x = 108,429.68