Finding the Fourth Proportional to 139,889.88, 193,121.10 and 108,776.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,889.88 : 193,121.10 = 108,776.16 : x
2. Step 2: Convert to fraction form
   139,889.88/193,121.10 = 108,776.16/x
3. Step 3: Cross multiply
   139,889.88x = 193,121.10 × 108,776.16
4. Step 4: Simplify right side
   139,889.88x = 21,006,971,672.98
5. Step 5: Solve for x
   x = 21,006,971,672.98/139,889.88
6. Step 6: Final answer
   x = 150,167.92