Finding the Fourth Proportional to 86,648.90, 119,507.52 and 56,443.72

Step by Step Solution

1. Step 1: Write the proportion equation
   86,648.90 : 119,507.52 = 56,443.72 : x
2. Step 2: Convert to fraction form
   86,648.90/119,507.52 = 56,443.72/x
3. Step 3: Cross multiply
   86,648.90x = 119,507.52 × 56,443.72
4. Step 4: Simplify right side
   86,648.90x = 6,745,448,996.77
5. Step 5: Solve for x
   x = 6,745,448,996.77/86,648.90
6. Step 6: Final answer
   x = 77,848.06