Finding the Fourth Proportional to 58,978.63, 88,405.63 and 40,212.15

Step by Step Solution

1. Step 1: Write the proportion equation
   58,978.63 : 88,405.63 = 40,212.15 : x
2. Step 2: Convert to fraction form
   58,978.63/88,405.63 = 40,212.15/x
3. Step 3: Cross multiply
   58,978.63x = 88,405.63 × 40,212.15
4. Step 4: Simplify right side
   58,978.63x = 3,554,980,454.40
5. Step 5: Solve for x
   x = 3,554,980,454.40/58,978.63
6. Step 6: Final answer
   x = 60,275.74