Finding the Fourth Proportional to 91,303.61, 136,961.60 and 28,119.83

Step by Step Solution

1. Step 1: Write the proportion equation
   91,303.61 : 136,961.60 = 28,119.83 : x
2. Step 2: Convert to fraction form
   91,303.61/136,961.60 = 28,119.83/x
3. Step 3: Cross multiply
   91,303.61x = 136,961.60 × 28,119.83
4. Step 4: Simplify right side
   91,303.61x = 3,851,336,083.12
5. Step 5: Solve for x
   x = 3,851,336,083.12/91,303.61
6. Step 6: Final answer
   x = 42,181.64