Finding the Fourth Proportional to 711,795,468, 982,380,870.72 and 398,549,868.96

Step by Step Solution

1. Step 1: Write the proportion equation
   711,795,468 : 982,380,870.72 = 398,549,868.96 : x
2. Step 2: Convert to fraction form
   711,795,468/982,380,870.72 = 398,549,868.96/x
3. Step 3: Cross multiply
   711,795,468x = 982,380,870.72 × 398,549,868.96
4. Step 4: Simplify right side
   711,795,468x = 391,527,767,294,266,688
5. Step 5: Solve for x
   x = 391,527,767,294,266,688/711,795,468
6. Step 6: Final answer
   x = 550,056,561.04