Finding the Fourth Proportional to 139,052.46, 191,880.58 and 78,614.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,052.46 : 191,880.58 = 78,614.72 : x
2. Step 2: Convert to fraction form
   139,052.46/191,880.58 = 78,614.72/x
3. Step 3: Cross multiply
   139,052.46x = 191,880.58 × 78,614.72
4. Step 4: Simplify right side
   139,052.46x = 15,084,638,070.14
5. Step 5: Solve for x
   x = 15,084,638,070.14/139,052.46
6. Step 6: Final answer
   x = 108,481.63