Finding the Fourth Proportional to 72,312.84, 99,774.54 and 42,079.86

Step by Step Solution

1. Step 1: Write the proportion equation
   72,312.84 : 99,774.54 = 42,079.86 : x
2. Step 2: Convert to fraction form
   72,312.84/99,774.54 = 42,079.86/x
3. Step 3: Cross multiply
   72,312.84x = 99,774.54 × 42,079.86
4. Step 4: Simplify right side
   72,312.84x = 4,198,498,674.76
5. Step 5: Solve for x
   x = 4,198,498,674.76/72,312.84
6. Step 6: Final answer
   x = 58,060.21