Finding the Fourth Proportional to 76,402.50, 105,437.07 and 42,868.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,402.50 : 105,437.07 = 42,868.50 : x
2. Step 2: Convert to fraction form
   76,402.50/105,437.07 = 42,868.50/x
3. Step 3: Cross multiply
   76,402.50x = 105,437.07 × 42,868.50
4. Step 4: Simplify right side
   76,402.50x = 4,519,929,035.30
5. Step 5: Solve for x
   x = 4,519,929,035.30/76,402.50
6. Step 6: Final answer
   x = 59,159.44