Finding the Fourth Proportional to 120,156.72, 180,060.12 and 57,754.32

Step by Step Solution

1. Step 1: Write the proportion equation
   120,156.72 : 180,060.12 = 57,754.32 : x
2. Step 2: Convert to fraction form
   120,156.72/180,060.12 = 57,754.32/x
3. Step 3: Cross multiply
   120,156.72x = 180,060.12 × 57,754.32
4. Step 4: Simplify right side
   120,156.72x = 10,399,249,789.72
5. Step 5: Solve for x
   x = 10,399,249,789.72/120,156.72
6. Step 6: Final answer
   x = 86,547.38