Finding the Fourth Proportional to 139,859.77, 193,079.63 and 109,167.05

Step by Step Solution

1. Step 1: Write the proportion equation
   139,859.77 : 193,079.63 = 109,167.05 : x
2. Step 2: Convert to fraction form
   139,859.77/193,079.63 = 109,167.05/x
3. Step 3: Cross multiply
   139,859.77x = 193,079.63 × 109,167.05
4. Step 4: Simplify right side
   139,859.77x = 21,077,933,622.19
5. Step 5: Solve for x
   x = 21,077,933,622.19/139,859.77
6. Step 6: Final answer
   x = 150,707.62