Finding the Fourth Proportional to 77,889.47, 107,487.50 and 42,079.41

Step by Step Solution

1. Step 1: Write the proportion equation
   77,889.47 : 107,487.50 = 42,079.41 : x
2. Step 2: Convert to fraction form
   77,889.47/107,487.50 = 42,079.41/x
3. Step 3: Cross multiply
   77,889.47x = 107,487.50 × 42,079.41
4. Step 4: Simplify right side
   77,889.47x = 4,523,010,371.98
5. Step 5: Solve for x
   x = 4,523,010,371.98/77,889.47
6. Step 6: Final answer
   x = 58,069.60