Finding the Fourth Proportional to 83,700.69, 115,427.88 and 54,969.72

Step by Step Solution

1. Step 1: Write the proportion equation
   83,700.69 : 115,427.88 = 54,969.72 : x
2. Step 2: Convert to fraction form
   83,700.69/115,427.88 = 54,969.72/x
3. Step 3: Cross multiply
   83,700.69x = 115,427.88 × 54,969.72
4. Step 4: Simplify right side
   83,700.69x = 6,345,038,243.79
5. Step 5: Solve for x
   x = 6,345,038,243.79/83,700.69
6. Step 6: Final answer
   x = 75,806.28