Finding the Fourth Proportional to 152,320.05, 210,135.49 and 91,857.10

Step by Step Solution

1. Step 1: Write the proportion equation
   152,320.05 : 210,135.49 = 91,857.10 : x
2. Step 2: Convert to fraction form
   152,320.05/210,135.49 = 91,857.10/x
3. Step 3: Cross multiply
   152,320.05x = 210,135.49 × 91,857.10
4. Step 4: Simplify right side
   152,320.05x = 19,302,435,667.80
5. Step 5: Solve for x
   x = 19,302,435,667.80/152,320.05
6. Step 6: Final answer
   x = 126,722.88