Finding the Fourth Proportional to 81,488.16, 112,453.32 and 45,678.18

Step by Step Solution

1. Step 1: Write the proportion equation
   81,488.16 : 112,453.32 = 45,678.18 : x
2. Step 2: Convert to fraction form
   81,488.16/112,453.32 = 45,678.18/x
3. Step 3: Cross multiply
   81,488.16x = 112,453.32 × 45,678.18
4. Step 4: Simplify right side
   81,488.16x = 5,136,662,992.56
5. Step 5: Solve for x
   x = 5,136,662,992.56/81,488.16
6. Step 6: Final answer
   x = 63,035.70