Finding the Fourth Proportional to 91,384.16, 137,078.12 and 28,204.32

Step by Step Solution

1. Step 1: Write the proportion equation
   91,384.16 : 137,078.12 = 28,204.32 : x
2. Step 2: Convert to fraction form
   91,384.16/137,078.12 = 28,204.32/x
3. Step 3: Cross multiply
   91,384.16x = 137,078.12 × 28,204.32
4. Step 4: Simplify right side
   91,384.16x = 3,866,195,126.22
5. Step 5: Solve for x
   x = 3,866,195,126.22/91,384.16
6. Step 6: Final answer
   x = 42,307.06