Finding the Fourth Proportional to 231,003.78, 346,643.91 and 99,675.78

Step by Step Solution

1. Step 1: Write the proportion equation
   231,003.78 : 346,643.91 = 99,675.78 : x
2. Step 2: Convert to fraction form
   231,003.78/346,643.91 = 99,675.78/x
3. Step 3: Cross multiply
   231,003.78x = 346,643.91 × 99,675.78
4. Step 4: Simplify right side
   231,003.78x = 34,552,002,111.50
5. Step 5: Solve for x
   x = 34,552,002,111.50/231,003.78
6. Step 6: Final answer
   x = 149,573.32