Finding the Fourth Proportional to 81,309.31, 112,203.16 and 45,012.10

Step by Step Solution

1. Step 1: Write the proportion equation
   81,309.31 : 112,203.16 = 45,012.10 : x
2. Step 2: Convert to fraction form
   81,309.31/112,203.16 = 45,012.10/x
3. Step 3: Cross multiply
   81,309.31x = 112,203.16 × 45,012.10
4. Step 4: Simplify right side
   81,309.31x = 5,050,499,072.16
5. Step 5: Solve for x
   x = 5,050,499,072.16/81,309.31
6. Step 6: Final answer
   x = 62,114.65