Finding the Fourth Proportional to 80,336,492.68, 120,520,774.86 and 42,015,258.76

Step by Step Solution

1. Step 1: Write the proportion equation
   80,336,492.68 : 120,520,774.86 = 42,015,258.76 : x
2. Step 2: Convert to fraction form
   80,336,492.68/120,520,774.86 = 42,015,258.76/x
3. Step 3: Cross multiply
   80,336,492.68x = 120,520,774.86 × 42,015,258.76
4. Step 4: Simplify right side
   80,336,492.68x = 5,063,711,541,698,602
5. Step 5: Solve for x
   x = 5,063,711,541,698,602/80,336,492.68
6. Step 6: Final answer
   x = 63,031,274.74