Finding the Fourth Proportional to 112,732.22, 155,570.61 and 64,988.79

Step by Step Solution

1. Step 1: Write the proportion equation
   112,732.22 : 155,570.61 = 64,988.79 : x
2. Step 2: Convert to fraction form
   112,732.22/155,570.61 = 64,988.79/x
3. Step 3: Cross multiply
   112,732.22x = 155,570.61 × 64,988.79
4. Step 4: Simplify right side
   112,732.22x = 10,110,345,703.46
5. Step 5: Solve for x
   x = 10,110,345,703.46/112,732.22
6. Step 6: Final answer
   x = 89,684.61