Finding the Fourth Proportional to 56,289.06, 84,530.28 and 49,978.15

Step by Step Solution

1. Step 1: Write the proportion equation
   56,289.06 : 84,530.28 = 49,978.15 : x
2. Step 2: Convert to fraction form
   56,289.06/84,530.28 = 49,978.15/x
3. Step 3: Cross multiply
   56,289.06x = 84,530.28 × 49,978.15
4. Step 4: Simplify right side
   56,289.06x = 4,224,666,989.47
5. Step 5: Solve for x
   x = 4,224,666,989.47/56,289.06
6. Step 6: Final answer
   x = 75,053.07