Finding the Fourth Proportional to 1,139,483.52, 1,572,423.30 and 623,134.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139,483.52 : 1,572,423.30 = 623,134.71 : x
2. Step 2: Convert to fraction form
   1,139,483.52/1,572,423.30 = 623,134.71/x
3. Step 3: Cross multiply
   1,139,483.52x = 1,572,423.30 × 623,134.71
4. Step 4: Simplify right side
   1,139,483.52x = 979,831,537,042.74
5. Step 5: Solve for x
   x = 979,831,537,042.74/1,139,483.52
6. Step 6: Final answer
   x = 859,890.92