Finding the Fourth Proportional to 112,574.84, 155,340.06 and 64,830.20

Step by Step Solution

1. Step 1: Write the proportion equation
   112,574.84 : 155,340.06 = 64,830.20 : x
2. Step 2: Convert to fraction form
   112,574.84/155,340.06 = 64,830.20/x
3. Step 3: Cross multiply
   112,574.84x = 155,340.06 × 64,830.20
4. Step 4: Simplify right side
   112,574.84x = 10,070,727,157.81
5. Step 5: Solve for x
   x = 10,070,727,157.81/112,574.84
6. Step 6: Final answer
   x = 89,458.06