Finding the Fourth Proportional to 91,398.56, 137,047.59 and 28,201.43

Step by Step Solution

1. Step 1: Write the proportion equation
   91,398.56 : 137,047.59 = 28,201.43 : x
2. Step 2: Convert to fraction form
   91,398.56/137,047.59 = 28,201.43/x
3. Step 3: Cross multiply
   91,398.56x = 137,047.59 × 28,201.43
4. Step 4: Simplify right side
   91,398.56x = 3,864,938,358.67
5. Step 5: Solve for x
   x = 3,864,938,358.67/91,398.56
6. Step 6: Final answer
   x = 42,286.65