Finding the Fourth Proportional to 152,893.81, 210,986.42 and 84,915.10

Step by Step Solution

1. Step 1: Write the proportion equation
   152,893.81 : 210,986.42 = 84,915.10 : x
2. Step 2: Convert to fraction form
   152,893.81/210,986.42 = 84,915.10/x
3. Step 3: Cross multiply
   152,893.81x = 210,986.42 × 84,915.10
4. Step 4: Simplify right side
   152,893.81x = 17,915,933,269.75
5. Step 5: Solve for x
   x = 17,915,933,269.75/152,893.81
6. Step 6: Final answer
   x = 117,178.93