Finding the Fourth Proportional to 155,003.57, 213,897.63 and 86,097.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,003.57 : 213,897.63 = 86,097.50 : x
2. Step 2: Convert to fraction form
   155,003.57/213,897.63 = 86,097.50/x
3. Step 3: Cross multiply
   155,003.57x = 213,897.63 × 86,097.50
4. Step 4: Simplify right side
   155,003.57x = 18,416,051,198.93
5. Step 5: Solve for x
   x = 18,416,051,198.93/155,003.57
6. Step 6: Final answer
   x = 118,810.50