Finding the Fourth Proportional to 152,240.89, 210,090.88 and 84,258

Step by Step Solution

1. Step 1: Write the proportion equation
   152,240.89 : 210,090.88 = 84,258 : x
2. Step 2: Convert to fraction form
   152,240.89/210,090.88 = 84,258/x
3. Step 3: Cross multiply
   152,240.89x = 210,090.88 × 84,258
4. Step 4: Simplify right side
   152,240.89x = 17,701,837,367.04
5. Step 5: Solve for x
   x = 17,701,837,367.04/152,240.89
6. Step 6: Final answer
   x = 116,275.18