Finding the Fourth Proportional to 139,493.75, 209,267.55 and 59,530.55

Step by Step Solution

1. Step 1: Write the proportion equation
   139,493.75 : 209,267.55 = 59,530.55 : x
2. Step 2: Convert to fraction form
   139,493.75/209,267.55 = 59,530.55/x
3. Step 3: Cross multiply
   139,493.75x = 209,267.55 × 59,530.55
4. Step 4: Simplify right side
   139,493.75x = 12,457,811,302.31
5. Step 5: Solve for x
   x = 12,457,811,302.31/139,493.75
6. Step 6: Final answer
   x = 89,307.31