Finding the Fourth Proportional to 405,810,028, 560,019,238.32 and 220,171,869.28

Step by Step Solution

1. Step 1: Write the proportion equation
   405,810,028 : 560,019,238.32 = 220,171,869.28 : x
2. Step 2: Convert to fraction form
   405,810,028/560,019,238.32 = 220,171,869.28/x
3. Step 3: Cross multiply
   405,810,028x = 560,019,238.32 × 220,171,869.28
4. Step 4: Simplify right side
   405,810,028x = 123,300,482,533,676,224
5. Step 5: Solve for x
   x = 123,300,482,533,676,224/405,810,028
6. Step 6: Final answer
   x = 303,837,939.00