Finding the Fourth Proportional to 159,139.16, 219,614.22 and 91,156.10

Step by Step Solution

1. Step 1: Write the proportion equation
   159,139.16 : 219,614.22 = 91,156.10 : x
2. Step 2: Convert to fraction form
   159,139.16/219,614.22 = 91,156.10/x
3. Step 3: Cross multiply
   159,139.16x = 219,614.22 × 91,156.10
4. Step 4: Simplify right side
   159,139.16x = 20,019,175,799.74
5. Step 5: Solve for x
   x = 20,019,175,799.74/159,139.16
6. Step 6: Final answer
   x = 125,796.67