Finding the Fourth Proportional to 118,894.71, 164,095.51 and 90,309

Step by Step Solution

1. Step 1: Write the proportion equation
   118,894.71 : 164,095.51 = 90,309 : x
2. Step 2: Convert to fraction form
   118,894.71/164,095.51 = 90,309/x
3. Step 3: Cross multiply
   118,894.71x = 164,095.51 × 90,309
4. Step 4: Simplify right side
   118,894.71x = 14,819,301,412.59
5. Step 5: Solve for x
   x = 14,819,301,412.59/118,894.71
6. Step 6: Final answer
   x = 124,642.23