Finding the Fourth Proportional to 424,003,597.31, 636,005,628.34 and 193,811,256.77

Step by Step Solution

1. Step 1: Write the proportion equation
   424,003,597.31 : 636,005,628.34 = 193,811,256.77 : x
2. Step 2: Convert to fraction form
   424,003,597.31/636,005,628.34 = 193,811,256.77/x
3. Step 3: Cross multiply
   424,003,597.31x = 636,005,628.34 × 193,811,256.77
4. Step 4: Simplify right side
   424,003,597.31x = 123,265,050,137,704,352
5. Step 5: Solve for x
   x = 123,265,050,137,704,352/424,003,597.31
6. Step 6: Final answer
   x = 290,716,991.36