Finding the Fourth Proportional to 77,378.76, 116,068.28 and 21,219.37

Step by Step Solution

1. Step 1: Write the proportion equation
   77,378.76 : 116,068.28 = 21,219.37 : x
2. Step 2: Convert to fraction form
   77,378.76/116,068.28 = 21,219.37/x
3. Step 3: Cross multiply
   77,378.76x = 116,068.28 × 21,219.37
4. Step 4: Simplify right side
   77,378.76x = 2,462,895,382.32
5. Step 5: Solve for x
   x = 2,462,895,382.32/77,378.76
6. Step 6: Final answer
   x = 31,829.09