Finding the Fourth Proportional to 139,498.63, 209,274.89 and 59,535.43

Step by Step Solution

1. Step 1: Write the proportion equation
   139,498.63 : 209,274.89 = 59,535.43 : x
2. Step 2: Convert to fraction form
   139,498.63/209,274.89 = 59,535.43/x
3. Step 3: Cross multiply
   139,498.63x = 209,274.89 × 59,535.43
4. Step 4: Simplify right side
   139,498.63x = 12,459,270,564.35
5. Step 5: Solve for x
   x = 12,459,270,564.35/139,498.63
6. Step 6: Final answer
   x = 89,314.64