Finding the Fourth Proportional to 139,053.55, 191,897.68 and 78,633.23

Step by Step Solution

1. Step 1: Write the proportion equation
   139,053.55 : 191,897.68 = 78,633.23 : x
2. Step 2: Convert to fraction form
   139,053.55/191,897.68 = 78,633.23/x
3. Step 3: Cross multiply
   139,053.55x = 191,897.68 × 78,633.23
4. Step 4: Simplify right side
   139,053.55x = 15,089,534,407.91
5. Step 5: Solve for x
   x = 15,089,534,407.91/139,053.55
6. Step 6: Final answer
   x = 108,516.00