Finding the Fourth Proportional to 288,661.69, 432,881.77 and 99,086.71

Step by Step Solution

1. Step 1: Write the proportion equation
   288,661.69 : 432,881.77 = 99,086.71 : x
2. Step 2: Convert to fraction form
   288,661.69/432,881.77 = 99,086.71/x
3. Step 3: Cross multiply
   288,661.69x = 432,881.77 × 99,086.71
4. Step 4: Simplify right side
   288,661.69x = 42,892,830,408.28
5. Step 5: Solve for x
   x = 42,892,830,408.28/288,661.69
6. Step 6: Final answer
   x = 148,592.04