Finding the Fourth Proportional to 112,821.02, 155,693.43 and 65,074.55

Step by Step Solution

1. Step 1: Write the proportion equation
   112,821.02 : 155,693.43 = 65,074.55 : x
2. Step 2: Convert to fraction form
   112,821.02/155,693.43 = 65,074.55/x
3. Step 3: Cross multiply
   112,821.02x = 155,693.43 × 65,074.55
4. Step 4: Simplify right side
   112,821.02x = 10,131,679,895.21
5. Step 5: Solve for x
   x = 10,131,679,895.21/112,821.02
6. Step 6: Final answer
   x = 89,803.12