Finding the Fourth Proportional to 2,158,123.71, 3,236,484.72 and 718,420.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,123.71 : 3,236,484.72 = 718,420.40 : x
2. Step 2: Convert to fraction form
   2,158,123.71/3,236,484.72 = 718,420.40/x
3. Step 3: Cross multiply
   2,158,123.71x = 3,236,484.72 × 718,420.40
4. Step 4: Simplify right side
   2,158,123.71x = 2,325,156,630,953.86
5. Step 5: Solve for x
   x = 2,325,156,630,953.86/2,158,123.71
6. Step 6: Final answer
   x = 1,077,397.29