Finding the Fourth Proportional to 148,443.19, 204,864.56 and 81,388.15

Step by Step Solution

1. Step 1: Write the proportion equation
   148,443.19 : 204,864.56 = 81,388.15 : x
2. Step 2: Convert to fraction form
   148,443.19/204,864.56 = 81,388.15/x
3. Step 3: Cross multiply
   148,443.19x = 204,864.56 × 81,388.15
4. Step 4: Simplify right side
   148,443.19x = 16,673,546,925.07
5. Step 5: Solve for x
   x = 16,673,546,925.07/148,443.19
6. Step 6: Final answer
   x = 112,322.75