Finding the Fourth Proportional to 56,111,963.06, 77,487,988.56 and 53,055,018.20

Step by Step Solution

1. Step 1: Write the proportion equation
   56,111,963.06 : 77,487,988.56 = 53,055,018.20 : x
2. Step 2: Convert to fraction form
   56,111,963.06/77,487,988.56 = 53,055,018.20/x
3. Step 3: Cross multiply
   56,111,963.06x = 77,487,988.56 × 53,055,018.20
4. Step 4: Simplify right side
   56,111,963.06x = 4,111,126,643,332,192
5. Step 5: Solve for x
   x = 4,111,126,643,332,192/56,111,963.06
6. Step 6: Final answer
   x = 73,266,491.12