Finding the Fourth Proportional to 78,309.90, 108,067.74 and 42,499.93

Step by Step Solution

1. Step 1: Write the proportion equation
   78,309.90 : 108,067.74 = 42,499.93 : x
2. Step 2: Convert to fraction form
   78,309.90/108,067.74 = 42,499.93/x
3. Step 3: Cross multiply
   78,309.90x = 108,067.74 × 42,499.93
4. Step 4: Simplify right side
   78,309.90x = 4,592,871,679.72
5. Step 5: Solve for x
   x = 4,592,871,679.72/78,309.90
6. Step 6: Final answer
   x = 58,649.95