Finding the Fourth Proportional to 666,009,211.83, 918,881,420.52 and 387,496,926.96

Step by Step Solution

1. Step 1: Write the proportion equation
   666,009,211.83 : 918,881,420.52 = 387,496,926.96 : x
2. Step 2: Convert to fraction form
   666,009,211.83/918,881,420.52 = 387,496,926.96/x
3. Step 3: Cross multiply
   666,009,211.83x = 918,881,420.52 × 387,496,926.96
4. Step 4: Simplify right side
   666,009,211.83x = 356,063,726,692,139,456
5. Step 5: Solve for x
   x = 356,063,726,692,139,456/666,009,211.83
6. Step 6: Final answer
   x = 534,622,825.58