Finding the Fourth Proportional to 139,041.82, 191,887.55 and 78,613.05

Step by Step Solution

1. Step 1: Write the proportion equation
   139,041.82 : 191,887.55 = 78,613.05 : x
2. Step 2: Convert to fraction form
   139,041.82/191,887.55 = 78,613.05/x
3. Step 3: Cross multiply
   139,041.82x = 191,887.55 × 78,613.05
4. Step 4: Simplify right side
   139,041.82x = 15,084,865,169.46
5. Step 5: Solve for x
   x = 15,084,865,169.46/139,041.82
6. Step 6: Final answer
   x = 108,491.57