Finding the Fourth Proportional to 259,483.59, 389,398.50 and 91,003.77

Step by Step Solution

1. Step 1: Write the proportion equation
   259,483.59 : 389,398.50 = 91,003.77 : x
2. Step 2: Convert to fraction form
   259,483.59/389,398.50 = 91,003.77/x
3. Step 3: Cross multiply
   259,483.59x = 389,398.50 × 91,003.77
4. Step 4: Simplify right side
   259,483.59x = 35,436,731,532.35
5. Step 5: Solve for x
   x = 35,436,731,532.35/259,483.59
6. Step 6: Final answer
   x = 136,566.37