Finding the Fourth Proportional to 81,870.96, 112,492.32 and 65,074.80

Step by Step Solution

1. Step 1: Write the proportion equation
   81,870.96 : 112,492.32 = 65,074.80 : x
2. Step 2: Convert to fraction form
   81,870.96/112,492.32 = 65,074.80/x
3. Step 3: Cross multiply
   81,870.96x = 112,492.32 × 65,074.80
4. Step 4: Simplify right side
   81,870.96x = 7,320,415,225.54
5. Step 5: Solve for x
   x = 7,320,415,225.54/81,870.96
6. Step 6: Final answer
   x = 89,414.06