Finding the Fourth Proportional to 76,978.48, 106,218.90 and 46,748.04

Step by Step Solution

1. Step 1: Write the proportion equation
   76,978.48 : 106,218.90 = 46,748.04 : x
2. Step 2: Convert to fraction form
   76,978.48/106,218.90 = 46,748.04/x
3. Step 3: Cross multiply
   76,978.48x = 106,218.90 × 46,748.04
4. Step 4: Simplify right side
   76,978.48x = 4,965,525,385.96
5. Step 5: Solve for x
   x = 4,965,525,385.96/76,978.48
6. Step 6: Final answer
   x = 64,505.37