Finding the Fourth Proportional to 288,542.17, 432,846.06 and 99,016.75

Step by Step Solution

1. Step 1: Write the proportion equation
   288,542.17 : 432,846.06 = 99,016.75 : x
2. Step 2: Convert to fraction form
   288,542.17/432,846.06 = 99,016.75/x
3. Step 3: Cross multiply
   288,542.17x = 432,846.06 × 99,016.75
4. Step 4: Simplify right side
   288,542.17x = 42,859,010,111.51
5. Step 5: Solve for x
   x = 42,859,010,111.51/288,542.17
6. Step 6: Final answer
   x = 148,536.38