Finding the Fourth Proportional to 152,988.58, 211,123.56 and 85,016.62

Step by Step Solution

1. Step 1: Write the proportion equation
   152,988.58 : 211,123.56 = 85,016.62 : x
2. Step 2: Convert to fraction form
   152,988.58/211,123.56 = 85,016.62/x
3. Step 3: Cross multiply
   152,988.58x = 211,123.56 × 85,016.62
4. Step 4: Simplify right side
   152,988.58x = 17,949,011,473.57
5. Step 5: Solve for x
   x = 17,949,011,473.57/152,988.58
6. Step 6: Final answer
   x = 117,322.56