Finding the Fourth Proportional to 153,026.54, 211,196.33 and 85,971.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153,026.54 : 211,196.33 = 85,971.50 : x
2. Step 2: Convert to fraction form
   153,026.54/211,196.33 = 85,971.50/x
3. Step 3: Cross multiply
   153,026.54x = 211,196.33 × 85,971.50
4. Step 4: Simplify right side
   153,026.54x = 18,156,864,443.54
5. Step 5: Solve for x
   x = 18,156,864,443.54/153,026.54
6. Step 6: Final answer
   x = 118,651.74