Finding the Fourth Proportional to 81,800.10, 112,887.39 and 45,990

Step by Step Solution

1. Step 1: Write the proportion equation
   81,800.10 : 112,887.39 = 45,990 : x
2. Step 2: Convert to fraction form
   81,800.10/112,887.39 = 45,990/x
3. Step 3: Cross multiply
   81,800.10x = 112,887.39 × 45,990
4. Step 4: Simplify right side
   81,800.10x = 5,191,691,066.10
5. Step 5: Solve for x
   x = 5,191,691,066.10/81,800.10
6. Step 6: Final answer
   x = 63,468.03