Finding the Fourth Proportional to 123,421.84, 185,139.16 and 39,188.59

Step by Step Solution

1. Step 1: Write the proportion equation
   123,421.84 : 185,139.16 = 39,188.59 : x
2. Step 2: Convert to fraction form
   123,421.84/185,139.16 = 39,188.59/x
3. Step 3: Cross multiply
   123,421.84x = 185,139.16 × 39,188.59
4. Step 4: Simplify right side
   123,421.84x = 7,255,342,073.37
5. Step 5: Solve for x
   x = 7,255,342,073.37/123,421.84
6. Step 6: Final answer
   x = 58,784.91