Finding the Fourth Proportional to 152,878.42, 210,965.16 and 84,899.71

Step by Step Solution

1. Step 1: Write the proportion equation
   152,878.42 : 210,965.16 = 84,899.71 : x
2. Step 2: Convert to fraction form
   152,878.42/210,965.16 = 84,899.71/x
3. Step 3: Cross multiply
   152,878.42x = 210,965.16 × 84,899.71
4. Step 4: Simplify right side
   152,878.42x = 17,910,880,904.10
5. Step 5: Solve for x
   x = 17,910,880,904.10/152,878.42
6. Step 6: Final answer
   x = 117,157.68