Finding the Fourth Proportional to 64,488.76, 96,079.38 and 61,312.65

Step by Step Solution

1. Step 1: Write the proportion equation
   64,488.76 : 96,079.38 = 61,312.65 : x
2. Step 2: Convert to fraction form
   64,488.76/96,079.38 = 61,312.65/x
3. Step 3: Cross multiply
   64,488.76x = 96,079.38 × 61,312.65
4. Step 4: Simplify right side
   64,488.76x = 5,890,881,152.82
5. Step 5: Solve for x
   x = 5,890,881,152.82/64,488.76
6. Step 6: Final answer
   x = 91,347.41