Finding the Fourth Proportional to 109,034,429.70, 163,551,644.55 and 78,423,428.10

Step by Step Solution

1. Step 1: Write the proportion equation
   109,034,429.70 : 163,551,644.55 = 78,423,428.10 : x
2. Step 2: Convert to fraction form
   109,034,429.70/163,551,644.55 = 78,423,428.10/x
3. Step 3: Cross multiply
   109,034,429.70x = 163,551,644.55 × 78,423,428.10
4. Step 4: Simplify right side
   109,034,429.70x = 12,826,280,637,003,682
5. Step 5: Solve for x
   x = 12,826,280,637,003,682/109,034,429.70
6. Step 6: Final answer
   x = 117,635,142.15