Finding the Fourth Proportional to 78,417.60, 108,216.96 and 42,607.68

Step by Step Solution

1. Step 1: Write the proportion equation
   78,417.60 : 108,216.96 = 42,607.68 : x
2. Step 2: Convert to fraction form
   78,417.60/108,216.96 = 42,607.68/x
3. Step 3: Cross multiply
   78,417.60x = 108,216.96 × 42,607.68
4. Step 4: Simplify right side
   78,417.60x = 4,610,873,602.25
5. Step 5: Solve for x
   x = 4,610,873,602.25/78,417.60
6. Step 6: Final answer
   x = 58,798.96