Finding the Fourth Proportional to 77,887.95, 107,485.41 and 42,077.91

Step by Step Solution

1. Step 1: Write the proportion equation
   77,887.95 : 107,485.41 = 42,077.91 : x
2. Step 2: Convert to fraction form
   77,887.95/107,485.41 = 42,077.91/x
3. Step 3: Cross multiply
   77,887.95x = 107,485.41 × 42,077.91
4. Step 4: Simplify right side
   77,887.95x = 4,522,761,408.29
5. Step 5: Solve for x
   x = 4,522,761,408.29/77,887.95
6. Step 6: Final answer
   x = 58,067.54