Finding the Fourth Proportional to 56,640.06, 78,162.01 and 30,798.05

Step by Step Solution

1. Step 1: Write the proportion equation
   56,640.06 : 78,162.01 = 30,798.05 : x
2. Step 2: Convert to fraction form
   56,640.06/78,162.01 = 30,798.05/x
3. Step 3: Cross multiply
   56,640.06x = 78,162.01 × 30,798.05
4. Step 4: Simplify right side
   56,640.06x = 2,407,237,024.28
5. Step 5: Solve for x
   x = 2,407,237,024.28/56,640.06
6. Step 6: Final answer
   x = 42,500.61