Finding the Fourth Proportional to 64,763.52, 89,050.56 and 55,315.20

Step by Step Solution

1. Step 1: Write the proportion equation
   64,763.52 : 89,050.56 = 55,315.20 : x
2. Step 2: Convert to fraction form
   64,763.52/89,050.56 = 55,315.20/x
3. Step 3: Cross multiply
   64,763.52x = 89,050.56 × 55,315.20
4. Step 4: Simplify right side
   64,763.52x = 4,925,849,536.51
5. Step 5: Solve for x
   x = 4,925,849,536.51/64,763.52
6. Step 6: Final answer
   x = 76,059.01