Finding the Fourth Proportional to 88,223.96, 121,763.58 and 64,429.40

Step by Step Solution

1. Step 1: Write the proportion equation
   88,223.96 : 121,763.58 = 64,429.40 : x
2. Step 2: Convert to fraction form
   88,223.96/121,763.58 = 64,429.40/x
3. Step 3: Cross multiply
   88,223.96x = 121,763.58 × 64,429.40
4. Step 4: Simplify right side
   88,223.96x = 7,845,154,401.25
5. Step 5: Solve for x
   x = 7,845,154,401.25/88,223.96
6. Step 6: Final answer
   x = 88,923.17