Finding the Fourth Proportional to 139,061.70, 191,904.03 and 78,632.34

Step by Step Solution

1. Step 1: Write the proportion equation
   139,061.70 : 191,904.03 = 78,632.34 : x
2. Step 2: Convert to fraction form
   139,061.70/191,904.03 = 78,632.34/x
3. Step 3: Cross multiply
   139,061.70x = 191,904.03 × 78,632.34
4. Step 4: Simplify right side
   139,061.70x = 15,089,862,934.33
5. Step 5: Solve for x
   x = 15,089,862,934.33/139,061.70
6. Step 6: Final answer
   x = 108,512.00