Finding the Fourth Proportional to 42,990.63, 64,521.48 and 21,946.22

Step by Step Solution

1. Step 1: Write the proportion equation
   42,990.63 : 64,521.48 = 21,946.22 : x
2. Step 2: Convert to fraction form
   42,990.63/64,521.48 = 21,946.22/x
3. Step 3: Cross multiply
   42,990.63x = 64,521.48 × 21,946.22
4. Step 4: Simplify right side
   42,990.63x = 1,416,002,594.81
5. Step 5: Solve for x
   x = 1,416,002,594.81/42,990.63
6. Step 6: Final answer
   x = 32,937.47