Finding the Fourth Proportional to 158,436, 218,648.16 and 91,368

Step by Step Solution

1. Step 1: Write the proportion equation
   158,436 : 218,648.16 = 91,368 : x
2. Step 2: Convert to fraction form
   158,436/218,648.16 = 91,368/x
3. Step 3: Cross multiply
   158,436x = 218,648.16 × 91,368
4. Step 4: Simplify right side
   158,436x = 19,977,445,082.88
5. Step 5: Solve for x
   x = 19,977,445,082.88/158,436
6. Step 6: Final answer
   x = 126,091.58