Finding the Fourth Proportional to 103,649.50, 155,468.07 and 60,978.90

Step by Step Solution

1. Step 1: Write the proportion equation
   103,649.50 : 155,468.07 = 60,978.90 : x
2. Step 2: Convert to fraction form
   103,649.50/155,468.07 = 60,978.90/x
3. Step 3: Cross multiply
   103,649.50x = 155,468.07 × 60,978.90
4. Step 4: Simplify right side
   103,649.50x = 9,480,271,893.72
5. Step 5: Solve for x
   x = 9,480,271,893.72/103,649.50
6. Step 6: Final answer
   x = 91,464.71