Finding the Fourth Proportional to 78,415.53, 108,215.02 and 42,607.86

Step by Step Solution

1. Step 1: Write the proportion equation
   78,415.53 : 108,215.02 = 42,607.86 : x
2. Step 2: Convert to fraction form
   78,415.53/108,215.02 = 42,607.86/x
3. Step 3: Cross multiply
   78,415.53x = 108,215.02 × 42,607.86
4. Step 4: Simplify right side
   78,415.53x = 4,610,810,069.51
5. Step 5: Solve for x
   x = 4,610,810,069.51/78,415.53
6. Step 6: Final answer
   x = 58,799.71