Finding the Fourth Proportional to 77,770, 107,322.60 and 42,442

Step by Step Solution

1. Step 1: Write the proportion equation
   77,770 : 107,322.60 = 42,442 : x
2. Step 2: Convert to fraction form
   77,770/107,322.60 = 42,442/x
3. Step 3: Cross multiply
   77,770x = 107,322.60 × 42,442
4. Step 4: Simplify right side
   77,770x = 4,554,985,789.20
5. Step 5: Solve for x
   x = 4,554,985,789.20/77,770
6. Step 6: Final answer
   x = 58,569.96