Finding the Fourth Proportional to 112,920.28, 155,812.82 and 64,513.77

Step by Step Solution

1. Step 1: Write the proportion equation
   112,920.28 : 155,812.82 = 64,513.77 : x
2. Step 2: Convert to fraction form
   112,920.28/155,812.82 = 64,513.77/x
3. Step 3: Cross multiply
   112,920.28x = 155,812.82 × 64,513.77
4. Step 4: Simplify right side
   112,920.28x = 10,052,071,525.66
5. Step 5: Solve for x
   x = 10,052,071,525.66/112,920.28
6. Step 6: Final answer
   x = 89,019.19