Finding the Fourth Proportional to 83,528.72, 115,138.72 and 63,304.64

Step by Step Solution

1. Step 1: Write the proportion equation
   83,528.72 : 115,138.72 = 63,304.64 : x
2. Step 2: Convert to fraction form
   83,528.72/115,138.72 = 63,304.64/x
3. Step 3: Cross multiply
   83,528.72x = 115,138.72 × 63,304.64
4. Step 4: Simplify right side
   83,528.72x = 7,288,815,219.66
5. Step 5: Solve for x
   x = 7,288,815,219.66/83,528.72
6. Step 6: Final answer
   x = 87,261.19