Finding the Fourth Proportional to 112,436.48, 168,679.02 and 42,315.60

Step by Step Solution

1. Step 1: Write the proportion equation
   112,436.48 : 168,679.02 = 42,315.60 : x
2. Step 2: Convert to fraction form
   112,436.48/168,679.02 = 42,315.60/x
3. Step 3: Cross multiply
   112,436.48x = 168,679.02 × 42,315.60
4. Step 4: Simplify right side
   112,436.48x = 7,137,753,938.71
5. Step 5: Solve for x
   x = 7,137,753,938.71/112,436.48
6. Step 6: Final answer
   x = 63,482.55