Finding the Fourth Proportional to 81,145.60, 111,981.49 and 45,337.12

Step by Step Solution

1. Step 1: Write the proportion equation
   81,145.60 : 111,981.49 = 45,337.12 : x
2. Step 2: Convert to fraction form
   81,145.60/111,981.49 = 45,337.12/x
3. Step 3: Cross multiply
   81,145.60x = 111,981.49 × 45,337.12
4. Step 4: Simplify right side
   81,145.60x = 5,076,917,856.61
5. Step 5: Solve for x
   x = 5,076,917,856.61/81,145.60
6. Step 6: Final answer
   x = 62,565.54