Finding the Fourth Proportional to 77,401.70, 116,135.43 and 42,300.35

Step by Step Solution

1. Step 1: Write the proportion equation
   77,401.70 : 116,135.43 = 42,300.35 : x
2. Step 2: Convert to fraction form
   77,401.70/116,135.43 = 42,300.35/x
3. Step 3: Cross multiply
   77,401.70x = 116,135.43 × 42,300.35
4. Step 4: Simplify right side
   77,401.70x = 4,912,569,468.11
5. Step 5: Solve for x
   x = 4,912,569,468.11/77,401.70
6. Step 6: Final answer
   x = 63,468.49