Finding the Fourth Proportional to 98,748.72, 148,138.47 and 42,604.65

Step by Step Solution

1. Step 1: Write the proportion equation
   98,748.72 : 148,138.47 = 42,604.65 : x
2. Step 2: Convert to fraction form
   98,748.72/148,138.47 = 42,604.65/x
3. Step 3: Cross multiply
   98,748.72x = 148,138.47 × 42,604.65
4. Step 4: Simplify right side
   98,748.72x = 6,311,387,665.89
5. Step 5: Solve for x
   x = 6,311,387,665.89/98,748.72
6. Step 6: Final answer
   x = 63,913.61