Finding the Fourth Proportional to 112,539.42, 155,287.15 and 64,783.54

Step by Step Solution

1. Step 1: Write the proportion equation
   112,539.42 : 155,287.15 = 64,783.54 : x
2. Step 2: Convert to fraction form
   112,539.42/155,287.15 = 64,783.54/x
3. Step 3: Cross multiply
   112,539.42x = 155,287.15 × 64,783.54
4. Step 4: Simplify right side
   112,539.42x = 10,060,051,447.13
5. Step 5: Solve for x
   x = 10,060,051,447.13/112,539.42
6. Step 6: Final answer
   x = 89,391.35