Finding the Fourth Proportional to 112,589.64, 155,373.78 and 64,842

Step by Step Solution

1. Step 1: Write the proportion equation
   112,589.64 : 155,373.78 = 64,842 : x
2. Step 2: Convert to fraction form
   112,589.64/155,373.78 = 64,842/x
3. Step 3: Cross multiply
   112,589.64x = 155,373.78 × 64,842
4. Step 4: Simplify right side
   112,589.64x = 10,074,746,642.76
5. Step 5: Solve for x
   x = 10,074,746,642.76/112,589.64
6. Step 6: Final answer
   x = 89,482.00