Finding the Fourth Proportional to 81,221.49, 112,089.15 and 45,411.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,221.49 : 112,089.15 = 45,411.50 : x
2. Step 2: Convert to fraction form
   81,221.49/112,089.15 = 45,411.50/x
3. Step 3: Cross multiply
   81,221.49x = 112,089.15 × 45,411.50
4. Step 4: Simplify right side
   81,221.49x = 5,090,136,715.45
5. Step 5: Solve for x
   x = 5,090,136,715.45/81,221.49
6. Step 6: Final answer
   x = 62,669.83