Finding the Fourth Proportional to 99,095.78, 148,666.37 and 42,945.31

Step by Step Solution

1. Step 1: Write the proportion equation
   99,095.78 : 148,666.37 = 42,945.31 : x
2. Step 2: Convert to fraction form
   99,095.78/148,666.37 = 42,945.31/x
3. Step 3: Cross multiply
   99,095.78x = 148,666.37 × 42,945.31
4. Step 4: Simplify right side
   99,095.78x = 6,384,523,131.50
5. Step 5: Solve for x
   x = 6,384,523,131.50/99,095.78
6. Step 6: Final answer
   x = 64,427.80