Finding the Fourth Proportional to 604,826,667.09, 907,335,660.02 and 216,640,903.05

Step by Step Solution

1. Step 1: Write the proportion equation
   604,826,667.09 : 907,335,660.02 = 216,640,903.05 : x
2. Step 2: Convert to fraction form
   604,826,667.09/907,335,660.02 = 216,640,903.05/x
3. Step 3: Cross multiply
   604,826,667.09x = 907,335,660.02 × 216,640,903.05
4. Step 4: Simplify right side
   604,826,667.09x = 196,566,016,755,117,376
5. Step 5: Solve for x
   x = 196,566,016,755,117,376/604,826,667.09
6. Step 6: Final answer
   x = 324,995,618.50