Finding the Fourth Proportional to 77,881.05, 107,475.89 and 42,071.05

Step by Step Solution

1. Step 1: Write the proportion equation
   77,881.05 : 107,475.89 = 42,071.05 : x
2. Step 2: Convert to fraction form
   77,881.05/107,475.89 = 42,071.05/x
3. Step 3: Cross multiply
   77,881.05x = 107,475.89 × 42,071.05
4. Step 4: Simplify right side
   77,881.05x = 4,521,623,541.98
5. Step 5: Solve for x
   x = 4,521,623,541.98/77,881.05
6. Step 6: Final answer
   x = 58,058.07