Finding the Fourth Proportional to 143,472.96, 215,210.48 and 49,978.40

Step by Step Solution

1. Step 1: Write the proportion equation
   143,472.96 : 215,210.48 = 49,978.40 : x
2. Step 2: Convert to fraction form
   143,472.96/215,210.48 = 49,978.40/x
3. Step 3: Cross multiply
   143,472.96x = 215,210.48 × 49,978.40
4. Step 4: Simplify right side
   143,472.96x = 10,755,875,453.63
5. Step 5: Solve for x
   x = 10,755,875,453.63/143,472.96
6. Step 6: Final answer
   x = 74,967.96