Finding the Fourth Proportional to 77,848, 107,432.80 and 42,520

Step by Step Solution

1. Step 1: Write the proportion equation
   77,848 : 107,432.80 = 42,520 : x
2. Step 2: Convert to fraction form
   77,848/107,432.80 = 42,520/x
3. Step 3: Cross multiply
   77,848x = 107,432.80 × 42,520
4. Step 4: Simplify right side
   77,848x = 4,568,042,656
5. Step 5: Solve for x
   x = 4,568,042,656/77,848
6. Step 6: Final answer
   x = 58,679.00