Finding the Fourth Proportional to 81,516.80, 112,498.56 and 45,709.10

Step by Step Solution

1. Step 1: Write the proportion equation
   81,516.80 : 112,498.56 = 45,709.10 : x
2. Step 2: Convert to fraction form
   81,516.80/112,498.56 = 45,709.10/x
3. Step 3: Cross multiply
   81,516.80x = 112,498.56 × 45,709.10
4. Step 4: Simplify right side
   81,516.80x = 5,142,207,928.90
5. Step 5: Solve for x
   x = 5,142,207,928.90/81,516.80
6. Step 6: Final answer
   x = 63,081.57