Finding the Fourth Proportional to 77,667.72, 116,536.45 and 46,139.39

Step by Step Solution

1. Step 1: Write the proportion equation
   77,667.72 : 116,536.45 = 46,139.39 : x
2. Step 2: Convert to fraction form
   77,667.72/116,536.45 = 46,139.39/x
3. Step 3: Cross multiply
   77,667.72x = 116,536.45 × 46,139.39
4. Step 4: Simplify right side
   77,667.72x = 5,376,920,715.77
5. Step 5: Solve for x
   x = 5,376,920,715.77/77,667.72
6. Step 6: Final answer
   x = 69,229.80