Finding the Fourth Proportional to 139,044.08, 191,890.67 and 78,615.32

Step by Step Solution

1. Step 1: Write the proportion equation
   139,044.08 : 191,890.67 = 78,615.32 : x
2. Step 2: Convert to fraction form
   139,044.08/191,890.67 = 78,615.32/x
3. Step 3: Cross multiply
   139,044.08x = 191,890.67 × 78,615.32
4. Step 4: Simplify right side
   139,044.08x = 15,085,545,074.53
5. Step 5: Solve for x
   x = 15,085,545,074.53/139,044.08
6. Step 6: Final answer
   x = 108,494.69