Finding the Fourth Proportional to 99,804.09, 137,752.80 and 65,818.71

Step by Step Solution

1. Step 1: Write the proportion equation
   99,804.09 : 137,752.80 = 65,818.71 : x
2. Step 2: Convert to fraction form
   99,804.09/137,752.80 = 65,818.71/x
3. Step 3: Cross multiply
   99,804.09x = 137,752.80 × 65,818.71
4. Step 4: Simplify right side
   99,804.09x = 9,066,711,594.89
5. Step 5: Solve for x
   x = 9,066,711,594.89/99,804.09
6. Step 6: Final answer
   x = 90,845.09