Finding the Fourth Proportional to 42,219.60, 58,223.20 and 31,488.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,219.60 : 58,223.20 = 31,488.16 : x
2. Step 2: Convert to fraction form
   42,219.60/58,223.20 = 31,488.16/x
3. Step 3: Cross multiply
   42,219.60x = 58,223.20 × 31,488.16
4. Step 4: Simplify right side
   42,219.60x = 1,833,341,437.31
5. Step 5: Solve for x
   x = 1,833,341,437.31/42,219.60
6. Step 6: Final answer
   x = 43,423.94