Finding the Fourth Proportional to 136,401.57, 188,312.24 and 91,156.19

Step by Step Solution

1. Step 1: Write the proportion equation
   136,401.57 : 188,312.24 = 91,156.19 : x
2. Step 2: Convert to fraction form
   136,401.57/188,312.24 = 91,156.19/x
3. Step 3: Cross multiply
   136,401.57x = 188,312.24 × 91,156.19
4. Step 4: Simplify right side
   136,401.57x = 17,165,825,615.09
5. Step 5: Solve for x
   x = 17,165,825,615.09/136,401.57
6. Step 6: Final answer
   x = 125,847.71