Finding the Fourth Proportional to 81,145.47, 111,978.68 and 45,335.74

Step by Step Solution

1. Step 1: Write the proportion equation
   81,145.47 : 111,978.68 = 45,335.74 : x
2. Step 2: Convert to fraction form
   81,145.47/111,978.68 = 45,335.74/x
3. Step 3: Cross multiply
   81,145.47x = 111,978.68 × 45,335.74
4. Step 4: Simplify right side
   81,145.47x = 5,076,636,095.34
5. Step 5: Solve for x
   x = 5,076,636,095.34/81,145.47
6. Step 6: Final answer
   x = 62,562.17