Finding the Fourth Proportional to 152,365.80, 210,262.50 and 85,300.20

Step by Step Solution

1. Step 1: Write the proportion equation
   152,365.80 : 210,262.50 = 85,300.20 : x
2. Step 2: Convert to fraction form
   152,365.80/210,262.50 = 85,300.20/x
3. Step 3: Cross multiply
   152,365.80x = 210,262.50 × 85,300.20
4. Step 4: Simplify right side
   152,365.80x = 17,935,433,302.50
5. Step 5: Solve for x
   x = 17,935,433,302.50/152,365.80
6. Step 6: Final answer
   x = 117,712.99