Finding the Fourth Proportional to 139,059.70, 191,901.27 and 78,630.34

Step by Step Solution

1. Step 1: Write the proportion equation
   139,059.70 : 191,901.27 = 78,630.34 : x
2. Step 2: Convert to fraction form
   139,059.70/191,901.27 = 78,630.34/x
3. Step 3: Cross multiply
   139,059.70x = 191,901.27 × 78,630.34
4. Step 4: Simplify right side
   139,059.70x = 15,089,262,106.53
5. Step 5: Solve for x
   x = 15,089,262,106.53/139,059.70
6. Step 6: Final answer
   x = 108,509.24