Finding the Fourth Proportional to 148,587.50, 205,054.35 and 81,519.50

Step by Step Solution

1. Step 1: Write the proportion equation
   148,587.50 : 205,054.35 = 81,519.50 : x
2. Step 2: Convert to fraction form
   148,587.50/205,054.35 = 81,519.50/x
3. Step 3: Cross multiply
   148,587.50x = 205,054.35 × 81,519.50
4. Step 4: Simplify right side
   148,587.50x = 16,715,928,084.83
5. Step 5: Solve for x
   x = 16,715,928,084.83/148,587.50
6. Step 6: Final answer
   x = 112,498.89