Finding the Fourth Proportional to 91,485.32, 137,242.55 and 28,302.89

Step by Step Solution

1. Step 1: Write the proportion equation
   91,485.32 : 137,242.55 = 28,302.89 : x
2. Step 2: Convert to fraction form
   91,485.32/137,242.55 = 28,302.89/x
3. Step 3: Cross multiply
   91,485.32x = 137,242.55 × 28,302.89
4. Step 4: Simplify right side
   91,485.32x = 3,884,360,180.51
5. Step 5: Solve for x
   x = 3,884,360,180.51/91,485.32
6. Step 6: Final answer
   x = 42,458.84