Finding the Third Proportional to 53,511.56 and 78,715.69

Step by Step Solution

1. Step 1: Write the proportion equation
   53,511.56 : 78,715.69 = 78,715.69 : x
2. Step 2: Convert to fraction form
   53,511.56/78,715.69 = 78,715.69/x
3. Step 3: Cross multiply
   53,511.56x = 78,715.69 × 78,715.69
4. Step 4: Simplify right side
   53,511.56x = 6,196,159,458.60
5. Step 5: Solve for x
   x = 6,196,159,458.60/53,511.56
6. Step 6: Final answer
   x = 115,791.04