Finding the Fourth Proportional to 134,587.98, 185,720.61 and 78,003

Step by Step Solution

1. Step 1: Write the proportion equation
   134,587.98 : 185,720.61 = 78,003 : x
2. Step 2: Convert to fraction form
   134,587.98/185,720.61 = 78,003/x
3. Step 3: Cross multiply
   134,587.98x = 185,720.61 × 78,003
4. Step 4: Simplify right side
   134,587.98x = 14,486,764,741.83
5. Step 5: Solve for x
   x = 14,486,764,741.83/134,587.98
6. Step 6: Final answer
   x = 107,637.88