Finding the Fourth Proportional to 55,129.68, 82,663.20 and 37,620.72

Step by Step Solution

1. Step 1: Write the proportion equation
   55,129.68 : 82,663.20 = 37,620.72 : x
2. Step 2: Convert to fraction form
   55,129.68/82,663.20 = 37,620.72/x
3. Step 3: Cross multiply
   55,129.68x = 82,663.20 × 37,620.72
4. Step 4: Simplify right side
   55,129.68x = 3,109,849,101.50
5. Step 5: Solve for x
   x = 3,109,849,101.50/55,129.68
6. Step 6: Final answer
   x = 56,409.71