Finding the Fourth Proportional to 91,563.63, 137,969.35 and 75,288.25

Step by Step Solution

1. Step 1: Write the proportion equation
   91,563.63 : 137,969.35 = 75,288.25 : x
2. Step 2: Convert to fraction form
   91,563.63/137,969.35 = 75,288.25/x
3. Step 3: Cross multiply
   91,563.63x = 137,969.35 × 75,288.25
4. Step 4: Simplify right side
   91,563.63x = 10,387,470,915.14
5. Step 5: Solve for x
   x = 10,387,470,915.14/91,563.63
6. Step 6: Final answer
   x = 113,445.38